added packages apt-utils ca-certificates

Because build is

1.  Slow because "apt-utils" not installed

2. to avoid build to exits with error without having certificate in wget , curl or even git clone

Signed-off-by: Pratik Raj <rajpratik71@gmail.com>

Author: Rajpratik71

3.1/Dockerfile

@@ -4,7 +4,7 @@ LABEL Description="Docker Container for the Apple's Swift programming language"
 
 # Install related packages and set LLVM 3.8 as the compiler
 RUN apt-get -q update && \
-    apt-get --no-install-recommends -q install -y \
+    apt-get --no-install-recommends install -y apt-utils ca-certificates \
     make \
     libc6-dev \
     clang-3.8 \

4.0/Dockerfile

@@ -4,7 +4,7 @@ LABEL Description="Docker Container for the Apple's Swift programming language"
 
 # Install related packages and set LLVM 3.8 as the compiler
 RUN apt-get -q update && \
-    apt-get --no-install-recommends -q install -y \
+    apt-get --no-install-recommends install -y apt-utils ca-certificates \
     make \
     libc6-dev \
     clang-3.8 \

4.1/Dockerfile

@@ -4,7 +4,7 @@ LABEL Description="Docker Container for the Apple's Swift programming language"
 
 # Install related packages and set LLVM 3.8 as the compiler
 RUN apt-get -q update && \
-    apt-get --no-install-recommends -q install -y \
+    apt-get --no-install-recommends install -y apt-utils ca-certificates \
     make \
     libc6-dev \
     clang-3.8 \

4.2/ubuntu/16.04/Dockerfile

@@ -4,7 +4,7 @@ LABEL Description="Docker Container for the Swift programming language"
 
 # Install related packages and set LLVM 3.8 as the compiler
 RUN apt-get -q update && \
-    apt-get --no-install-recommends -q install -y \
+    apt-get --no-install-recommends install -y apt-utils ca-certificates \
     make \
     libc6-dev \
     clang-3.8 \

4.2/ubuntu/18.04/Dockerfile

@@ -4,7 +4,7 @@ LABEL Description="Docker Container for the Swift programming language"
 
 # Install related packages and set LLVM 3.9 as the compiler
 RUN export DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true && apt-get -q update && \
-    apt-get --no-install-recommends -q install -y \
+    apt-get --no-install-recommends install -y apt-utils ca-certificates \
     make \
     libc6-dev \
     clang-3.9 \

5.0/ubuntu/16.04/Dockerfile

@@ -3,7 +3,7 @@ LABEL maintainer="Swift Infrastructure <swift-infrastructure@swift.org>"
 LABEL Description="Docker Container for the Swift programming language"
 
 RUN apt-get -q update && \
-    apt-get --no-install-recommends -q install -y \
+    apt-get --no-install-recommends install -y apt-utils ca-certificates \
     libatomic1 \
     libbsd0 \
     libcurl3 \

5.0/ubuntu/16.04/slim/Dockerfile

@@ -3,7 +3,7 @@ LABEL maintainer="Swift Infrastructure <swift-infrastructure@swift.org>"
 LABEL Description="Docker Container for the Swift programming language"
 
 RUN export DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true && apt-get -q update && \
-    apt-get --no-install-recommends -q install -y \
+    apt-get --no-install-recommends install -y apt-utils ca-certificates \
     libatomic1 \
     libbsd0 \
     libcurl3 \

5.0/ubuntu/18.04/Dockerfile

@@ -3,7 +3,7 @@ LABEL maintainer="Swift Infrastructure <swift-infrastructure@swift.org>"
 LABEL Description="Docker Container for the Swift programming language"
 
 RUN export DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true && apt-get -q update && \
-    apt-get --no-install-recommends -q install -y \
+    apt-get --no-install-recommends install -y apt-utils ca-certificates \
     libatomic1 \
     libbsd0 \
     libcurl4 \

5.0/ubuntu/18.04/slim/Dockerfile

@@ -3,7 +3,7 @@ LABEL maintainer="Swift Infrastructure <swift-infrastructure@swift.org>"
 LABEL Description="Docker Container for the Swift programming language"
 
 RUN export DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true && apt-get -q update && \
-    apt-get --no-install-recommends -q install -y \
+    apt-get --no-install-recommends install -y apt-utils ca-certificates \
     libatomic1 \
     libbsd0 \
     libcurl4 \

5.1/ubuntu/16.04/Dockerfile

@@ -3,7 +3,7 @@ LABEL maintainer="Swift Infrastructure <swift-infrastructure@swift.org>"
 LABEL Description="Docker Container for the Swift programming language"
 
 RUN export DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true && apt-get -q update && \
-    apt-get --no-install-recommends -q install -y \
+    apt-get --no-install-recommends install -y apt-utils ca-certificates \
     libatomic1 \
     libcurl3 \
     libxml2 \