Make helper functions static.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@136679 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/LiveVariables.cpp b/lib/Analysis/LiveVariables.cpp
index f81019e..c6c091e 100644
--- a/lib/Analysis/LiveVariables.cpp
+++ b/lib/Analysis/LiveVariables.cpp
@@ -433,10 +433,11 @@
   return new LiveVariables(LV);
 }
 
-bool compare_entries(const CFGBlock *A, const CFGBlock *B) {
+static bool compare_entries(const CFGBlock *A, const CFGBlock *B) {
   return A->getBlockID() < B->getBlockID();
 }
-bool compare_vd_entries(const Decl *A, const Decl *B) {
+
+static bool compare_vd_entries(const Decl *A, const Decl *B) {
   SourceLocation ALoc = A->getLocStart();
   SourceLocation BLoc = B->getLocStart();
   return ALoc.getRawEncoding() < BLoc.getRawEncoding();