Driver: Fix a misleading comment and test for what it actually did

llvm-svn: 211806
diff --git a/clang/test/Driver/crash-report.c b/clang/test/Driver/crash-report.c
index f3c2e47..da1ff95 100644
--- a/clang/test/Driver/crash-report.c
+++ b/clang/test/Driver/crash-report.c
@@ -36,3 +36,4 @@
 // CHECKSH-NOT: -internal-isystem /tmp/
 // CHECKSH-NOT: -internal-externc-isystem /tmp/
 // CHECKSH-NOT: -dwarf-debug-flags
+// CHECKSH: crash-report-{{[^ ]*}}.c