Merge pull request #527 from apple/revert-526-revert-519-swift-support

Revert "Revert "build: port to new Swift support""

Signed-off-by: Rokhini Prabhu <[email protected]>

Author: shahmishal

PATCHES

@@ -530,3 +530,4 @@ github commits starting with 29bdc2f from
 [c66cb25] APPLIED rdar://81276248
 [289e552] APPLIED rdar://81276248
 [afd6b6d] APPLIED rdar://81276248
+[4c91d20] APPLIED rdar://81276248