lib/Support/Windows/Signals.inc: "Showstopper" dialogs may be suppressed with SetErrorMode() on Windows 7.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123685 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/Windows/Signals.inc b/lib/Support/Windows/Signals.inc
index c0e3eca..14f3f21 100644
--- a/lib/Support/Windows/Signals.inc
+++ b/lib/Support/Windows/Signals.inc
@@ -112,6 +112,9 @@
 #ifdef _MSC_VER
     _CrtSetReportHook(CRTReportHook);
 #endif
+    SetErrorMode(SEM_FAILCRITICALERRORS |
+                 SEM_NOGPFAULTERRORBOX |
+                 SEM_NOOPENFILEERRORBOX);
     ExitOnUnhandledExceptions = true;
   }