Test fixes and improvements.

Remove redundant -fno-stack-protector run with openbsd.
Add -target to the -fstack-protector tests so they pass on openbsd.

Patch by Brad Smith.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@209991 91177308-0d34-0410-b5e6-96231b3b80d8

test/Driver/stack-protector.c

 // RUN: %clang -fno-stack-protector -### %s 2>&1 | FileCheck %s -check-prefix=NOSSP
-// NOSSP-NOT: "-stack-protector" "1"
+// NOSSP-NOT: "-stack-protector"
 // NOSSP-NOT: "-stack-protector-buffer-size" 
 
-// RUN: %clang -fstack-protector -### %s 2>&1 | FileCheck %s -check-prefix=SSP
+// RUN: %clang -target i386-unknown-linux -fstack-protector -### %s 2>&1 | FileCheck %s -check-prefix=SSP
 // SSP: "-stack-protector" "1"
 // SSP-NOT: "-stack-protector-buffer-size" 
 
-// RUN: %clang -fstack-protector --param ssp-buffer-size=16 -### %s 2>&1 | FileCheck %s -check-prefix=SSP-BUF
+// RUN: %clang -target i386-unknown-linux -fstack-protector --param ssp-buffer-size=16 -### %s 2>&1 | FileCheck %s -check-prefix=SSP-BUF
 // SSP-BUF: "-stack-protector" "1"
 // SSP-BUF: "-stack-protector-buffer-size" "16" 
 
@@ -16,9 +16,6 @@
 // RUN: %clang -target i386-pc-openbsd -fstack-protector -### %s 2>&1 | FileCheck %s -check-prefix=OPENBSD_SPS
 // OPENBSD_SPS: "-stack-protector" "2"
 
-// RUN: %clang -target i386-pc-openbsd -fno-stack-protector -### %s 2>&1 | FileCheck %s -check-prefix=OPENBSD_OFF
-// OPENBSD_OFF-NOT: "-stack-protector"
-
 // RUN: %clang -fstack-protector-strong -### %s 2>&1 | FileCheck %s -check-prefix=SSP-STRONG
 // SSP-STRONG: "-stack-protector" "2"
 // SSP-STRONG-NOT: "-stack-protector-buffer-size"