[ARMv8] Change the naming of some options to be more consistent.

Clang side changes for LLVM r190692.

llvm-svn: 190693
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index eca94b6..19f9c31 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -592,9 +592,9 @@
     Features.push_back("+vfp3");
     Features.push_back("-neon");
   } else if (FPU == "fp-armv8") {
-    Features.push_back("+v8fp");
+    Features.push_back("+fp-armv8");
   } else if (FPU == "neon-fp-armv8") {
-    Features.push_back("+v8fp");
+    Features.push_back("+fp-armv8");
     Features.push_back("+neon");
   } else if (FPU == "neon") {
     Features.push_back("+neon");