There is no reason to abort and print a stack trace if there is a verification
error.  Just print the message like a good little tool.

llvm-svn: 14793
diff --git a/llvm/tools/llvm-as/llvm-as.cpp b/llvm/tools/llvm-as/llvm-as.cpp
index 003ae4d..406f3e3 100644
--- a/llvm/tools/llvm-as/llvm-as.cpp
+++ b/llvm/tools/llvm-as/llvm-as.cpp
@@ -57,7 +57,7 @@
       return 1;
     }
 
-    if (!DisableVerify && verifyModule(*M.get())) {
+    if (!DisableVerify && verifyModule(*M.get(), PrintMessageAction)) {
       std::cerr << argv[0]
                 << ": assembly parsed, but does not verify as correct!\n";
       return 1;