Enable the profiler on FreeBSD

FreeBSD has been doing this in our own package builds for two months
now.

https://svnweb.freebsd.org/ports?view=revision&revision=535771

Author: asomers

src/ci/docker/host-x86_64/dist-i686-freebsd/Dockerfile

@@ -29,5 +29,5 @@ ENV \
 
 ENV HOSTS=i686-unknown-freebsd
 
-ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
+ENV RUST_CONFIGURE_ARGS --enable-extended --enable-profiler --disable-docs
 ENV SCRIPT python3 ../x.py dist --host $HOSTS --target $HOSTS

src/ci/docker/host-x86_64/dist-x86_64-freebsd/Dockerfile

@@ -29,5 +29,5 @@ ENV \
 
 ENV HOSTS=x86_64-unknown-freebsd
 
-ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
+ENV RUST_CONFIGURE_ARGS --enable-extended --enable-profiler --disable-docs
 ENV SCRIPT python3 ../x.py dist --host $HOSTS --target $HOSTS