Clean up the use of static and anonymous namespaces. This turned up
several things that were neither in an anonymous namespace nor static
but not intended to be global.

llvm-svn: 51017
diff --git a/llvm/lib/System/Unix/Unix.h b/llvm/lib/System/Unix/Unix.h
index a7030fc..b2c3160 100644
--- a/llvm/lib/System/Unix/Unix.h
+++ b/llvm/lib/System/Unix/Unix.h
@@ -70,7 +70,7 @@
 /// string and the Unix error number given by \p errnum. If errnum is -1, the
 /// default then the value of errno is used.
 /// @brief Make an error message
-inline bool MakeErrMsg(
+static inline bool MakeErrMsg(
   std::string* ErrMsg, const std::string& prefix, int errnum = -1) {
   if (!ErrMsg)
     return true;