Merge pull request #1546 from apple/mracek/propagate-no-alloc-flag

Propagate the -no-allocations frontend flag to the frontend

Author: kubamracek

Sources/SwiftDriver/Jobs/FrontendJobHelpers.swift

@@ -254,6 +254,9 @@ extension Driver {
     try commandLine.appendAll(.debugPrefixMap, .coveragePrefixMap, .filePrefixMap, from: &parsedOptions)
     try commandLine.appendAllArguments(.Xfrontend, from: &parsedOptions)
     try commandLine.appendLast(.warnConcurrency, from: &parsedOptions)
+    if isFrontendArgSupported(.noAllocations) {
+      try commandLine.appendLast(.noAllocations, from: &parsedOptions)
+    }
     if isFrontendArgSupported(.enableExperimentalFeature) {
       try commandLine.appendAll(
         .enableExperimentalFeature, from: &parsedOptions)