Add support to include multiple toolchain alias

Author: shahmishal

utils/build-script-impl

@@ -3505,7 +3505,15 @@ function build_and_test_installable_package() {
           call ${PLISTBUDDY_BIN} -c "Add CFBundleIdentifier string '${DARWIN_TOOLCHAIN_BUNDLE_IDENTIFIER}'" "${DARWIN_TOOLCHAIN_INFO_PLIST}"
           call ${PLISTBUDDY_BIN} -c "Add ReportProblemURL string '${DARWIN_TOOLCHAIN_REPORT_URL}'" "${DARWIN_TOOLCHAIN_INFO_PLIST}"
           call ${PLISTBUDDY_BIN} -c "Add Aliases array" "${DARWIN_TOOLCHAIN_INFO_PLIST}"
-          call ${PLISTBUDDY_BIN} -c "Add Aliases:0 string '${DARWIN_TOOLCHAIN_ALIAS}'" "${DARWIN_TOOLCHAIN_INFO_PLIST}"
+
+          aliases_count=0
+          IFS=","
+          for alias_name in ${DARWIN_TOOLCHAIN_ALIAS}
+          do
+            call ${PLISTBUDDY_BIN} -c "Add Aliases:${aliases_count} string '${alias_name}'" "${DARWIN_TOOLCHAIN_INFO_PLIST}"
+            aliases_count=$[$aliases_count +1]
+          done
+
           call ${PLISTBUDDY_BIN} -c "Add OverrideBuildSettings dict" "${DARWIN_TOOLCHAIN_INFO_PLIST}"
           call ${PLISTBUDDY_BIN} -c "Add OverrideBuildSettings:ENABLE_BITCODE string 'NO'" "${DARWIN_TOOLCHAIN_INFO_PLIST}"
           call ${PLISTBUDDY_BIN} -c "Add OverrideBuildSettings:SWIFT_DISABLE_REQUIRED_ARCLITE string 'YES'" "${DARWIN_TOOLCHAIN_INFO_PLIST}"