A quick nm audit turned up several fixed tables and objects that were
marked read-write. Use const so that they can be allocated in a
read-only segment.

llvm-svn: 48800
diff --git a/llvm/lib/CodeGen/PseudoSourceValue.cpp b/llvm/lib/CodeGen/PseudoSourceValue.cpp
index 5c5b1d6..c62e49a 100644
--- a/llvm/lib/CodeGen/PseudoSourceValue.cpp
+++ b/llvm/lib/CodeGen/PseudoSourceValue.cpp
@@ -29,7 +29,7 @@
   const PseudoSourceValue *PseudoSourceValue::getJumpTable()
   { return &(*PSVs)[4]; }
 
-  static const char *PSVNames[] = {
+  static const char *const PSVNames[] = {
     "FixedStack",
     "Stack",
     "GOT",