[sanitizer] make the error messages from sanitizer_common contain the actual tool name

llvm-svn: 174059
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_common.cc b/compiler-rt/lib/sanitizer_common/sanitizer_common.cc
index 07223b2..163e942 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_common.cc
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_common.cc
@@ -16,6 +16,8 @@
 
 namespace __sanitizer {
 
+const char *SanitizerToolName = "SanitizerTool";
+
 uptr GetPageSizeCached() {
   static uptr PageSize;
   if (!PageSize)