Merge "Build darwin_arm64 from source" am: 21204cd2c8 am: 7d0af1d166 am: 20e31dab32 am: 066d58e41c

Original change: https://android-review.googlesource.com/c/platform/external/llvm/+/1885368

Change-Id: I882820ef6d4a088a81aa2446a7a8d22f8ac21f08
diff --git a/soong/llvm.go b/soong/llvm.go
index edbc9cb..6a38fb5 100644
--- a/soong/llvm.go
+++ b/soong/llvm.go
@@ -89,6 +89,9 @@
 	if !forceBuild {
 		type props struct {
 			Target struct {
+				Darwin_arm64 struct {
+					Enabled *bool
+				}
 				Host struct {
 					Enabled *bool
 				}
@@ -98,6 +101,7 @@
 			}
 		}
 		p := &props{}
+		p.Target.Darwin_arm64.Enabled = proptools.BoolPtr(true)
 		p.Target.Host.Enabled = proptools.BoolPtr(false)
 		p.Target.Linux_bionic_arm64.Enabled = proptools.BoolPtr(true)
 		ctx.AppendProperties(p)