move a few more symbols to .rodata/.data.rel.ro

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@92012 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index 401bfe7..b6b5c6c 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -628,7 +628,7 @@
 #include "clang/Basic/BuiltinsX86.def"
 };
 
-const char *GCCRegNames[] = {
+static const char* const GCCRegNames[] = {
   "ax", "dx", "cx", "bx", "si", "di", "bp", "sp",
   "st", "st(1)", "st(2)", "st(3)", "st(4)", "st(5)", "st(6)", "st(7)",
   "argp", "flags", "fspr", "dirflag", "frame",