[llvm-mca] use colors for warnings and notes generated by InstrBuilder.

llvm-svn: 331517
diff --git a/llvm/tools/llvm-mca/llvm-mca.cpp b/llvm/tools/llvm-mca/llvm-mca.cpp
index 14be435..abd6d8a 100644
--- a/llvm/tools/llvm-mca/llvm-mca.cpp
+++ b/llvm/tools/llvm-mca/llvm-mca.cpp
@@ -229,8 +229,7 @@
       TheTarget->createMCAsmParser(STI, Parser, MCII, MCOptions));
 
   if (!TAP) {
-    errs() << ProgName
-           << ": error: this target does not support assembly parsing.\n";
+    WithColor::error() << "this target does not support assembly parsing.\n";
     return 1;
   }