Teach clang driver about Cortex-A53 and Cortex-A57.

Adds some Cortex-A53 strings where they were missing before.
Cortex-A57 is entirely new to clang.

Doesn't touch code only used by Darwin, in consequence of which
one of the A53 lines has been removed.

Change-Id: I5edb58f6eae93947334787e26a8772c736de6483

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193364 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index 4deaa64..2b3f9a5 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -3869,13 +3869,14 @@
       .Case("swift", "7S")
       .Cases("cortex-m3", "cortex-m4", "7M")
       .Case("cortex-m0", "6M")
-      .Case("cortex-a53", "8A")
+      .Cases("cortex-a53", "cortex-a57", "8A")
       .Default(0);
   }
   static const char *getCPUProfile(StringRef Name) {
     return llvm::StringSwitch<const char*>(Name)
       .Cases("cortex-a5", "cortex-a7", "cortex-a8", "A")
       .Cases("cortex-a9", "cortex-a12", "cortex-a15", "A")
+      .Cases("cortex-a53", "cortex-a57", "A")
       .Cases("cortex-m3", "cortex-m4", "cortex-m0", "M")
       .Cases("cortex-r4", "cortex-r5", "R")
       .Default("");