Add support for passing '-target armv8' through the Driver.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184970 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index c592399..b5a5cbe 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -3750,6 +3750,7 @@
       .Case("swift", "7S")
       .Cases("cortex-m3", "cortex-m4", "7M")
       .Case("cortex-m0", "6M")
+      .Case("cortex-a53", "8A")
       .Default(0);
   }
   static const char *getCPUProfile(StringRef Name) {