Fix output path substitution in %target-build-swift-dylib

Author: ramonasuncion

test/lit.cfg

@@ -1764,7 +1764,7 @@ elif run_os in ['windows-msvc']:
     subst_target_swift_frontend_mock_sdk_after = ''
 
     config.target_build_swift_dylib =                                            \
-            SubstituteCaptures(r"%s -parse-as-library -emit-library -o \1" % (
+            SubstituteCaptures(r"%s -parse-as-library -emit-library -o \1\2" % (
                 escape_for_substitute_captures(config.target_build_swift)))
     config.target_add_rpath = r''
 
@@ -1902,7 +1902,7 @@ elif (run_os in ['linux-gnu', 'linux-gnueabihf', 'freebsd', 'openbsd', 'windows-
     config.target_codesign = "echo"
     config.target_build_swift_dylib = SubstituteCaptures(
         f"{escape_for_substitute_captures(config.target_build_swift)}"
-        r" -parse-as-library -emit-library -o '\1'"
+        r" -parse-as-library -emit-library -o '\1\2'"
     )
     config.target_add_rpath = SubstituteCaptures(r'-Xlinker -rpath -Xlinker \1')
     config.target_swift_frontend = (
@@ -1996,7 +1996,7 @@ elif run_os == 'linux-androideabi' or run_os == 'linux-android':
     config.target_codesign = "echo"
     config.target_build_swift_dylib = SubstituteCaptures(
         f"{escape_for_substitute_captures(config.target_build_swift)}"
-        r" -parse-as-library -emit-library -o '\1'"
+        r" -parse-as-library -emit-library -o '\1\2'"
     )
     config.target_add_rpath = SubstituteCaptures(r'-Xlinker -rpath -Xlinker \1')
     config.target_swift_frontend = ' '.join([
@@ -2083,7 +2083,7 @@ elif kIsWASI:
     config.target_codesign = "echo"
     config.target_build_swift_dylib = SubstituteCaptures(
         f"{escape_for_substitute_captures(config.target_build_swift)}"
-        r" -parse-as-library -emit-library -static -o '\1'"
+        r" -parse-as-library -emit-library -static -o '\1\2'"
     )
     config.target_add_rpath = ''
     config.target_swift_frontend = ' '.join([
@@ -2167,7 +2167,7 @@ elif config.external_embedded_platform:
     config.target_codesign = "echo"
     config.target_build_swift_dylib = SubstituteCaptures(
         f"{escape_for_substitute_captures(config.target_build_swift)}"
-        r" -parse-as-library -emit-library -static -o '\1'"
+        r" -parse-as-library -emit-library -static -o '\1\2'"
     )
     config.target_add_rpath = ''
     config.target_swift_frontend = ' '.join([