[ARM] Add support for ARMV6K subtarget (Clang)

ARMv6K is another layer between ARMV6 and ARMV6T2. This is the Clang
side of the changes.

ARMV6 family LLVM implementation.

+-------------------------------------+
| ARMV6                               |
+----------------+--------------------+
| ARMV6M (thumb) | ARMV6K (arm,thumb) | <- From ARMV6K and ARMV6M processors
+----------------+--------------------+    have support for hint instructions
| ARMV6T2 (arm,thumb,thumb2)          |    (SEV/WFE/WFI/NOP/YIELD). They can
+-------------------------------------+    be either real or default to NOP.
| ARMV7 (arm,thumb,thumb2)            |    The two processors also use
+-------------------------------------+    different encoding for them.

Patch by Vinicius Tinti.

llvm-svn: 232469
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index fd8d72b..d9f5dc0 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -5561,8 +5561,9 @@
     .Cases("arm9e",  "arm926ej-s",  "arm946e-s", "v5e")
     .Cases("arm966e-s",  "arm968e-s",  "arm10e", "v5e")
     .Cases("arm1020e",  "arm1022e",  "xscale", "iwmmxt", "v5e")
-    .Cases("arm1136j-s",  "arm1136jf-s",  "arm1176jz-s", "v6")
-    .Cases("arm1176jzf-s",  "mpcorenovfp",  "mpcore", "v6")
+    .Cases("arm1136j-s",  "arm1136jf-s", "v6")
+    .Cases("arm1176jz-s", "arm1176jzf-s", "v6k")
+    .Cases("mpcorenovfp",  "mpcore", "v6k")
     .Cases("arm1156t2-s",  "arm1156t2f-s", "v6t2")
     .Cases("cortex-a5", "cortex-a7", "cortex-a8", "v7")
     .Cases("cortex-a9", "cortex-a12", "cortex-a15", "cortex-a17", "krait", "v7")
@@ -5583,7 +5584,7 @@
   StringRef Suffix = getLLVMArchSuffixForARM(getARMCPUForMArch(Args, Triple));
   const char *LinkFlag = llvm::StringSwitch<const char *>(Suffix)
     .Cases("v4", "v4t", "v5", "v5e", nullptr)
-    .Cases("v6", "v6t2", nullptr)
+    .Cases("v6", "v6k", "v6t2", nullptr)
     .Default("--be8");
 
   if (LinkFlag)