[clang][safestack] Remove triple from stack usage test

[paulkirth]

Summary

Supplying the target triple caused breakeages for compilers that don't support
the supplied triple.

[vvereschaka]

Thank you @paulkirth. I have tested these changes locally on the builder. It works fine.

[paulkirth]

unfortunately it breaks many other tests, so we probably need to revert this

clang/test/Frontend/stack-usage-safestack.c

 /// Check that stack frame size warnings behave the same when safe stack is enabled
 
-// REQUIRES: x86-registered-target
+// RUN: %clang_cc1 %s -fwarn-stack-size=48 -S -o - 2>&1 | FileCheck --check-prefix=REGULAR %s
+// RUN: %clang_cc1 %s -fwarn-stack-size=1060 -S -o - 2>&1 | FileCheck --check-prefix=IGNORE %s
 
-// RUN: %clang_cc1 %s -fwarn-stack-size=48 -S -o - -triple=i386-apple-darwin 2>&1 | FileCheck --check-prefix=REGULAR %s
-// RUN: %clang_cc1 %s -fwarn-stack-size=1060 -S -o - -triple=i386-apple-darwin 2>&1 | FileCheck --check-prefix=IGNORE %s
-
-// RUN: %clang_cc1 %s -fsanitize=safe-stack -fwarn-stack-size=48 -S -o - -triple=i386-apple-darwin 2>&1 | FileCheck --check-prefix=SAFESTACK %s
-// RUN: %clang_cc1 %s -fsanitize=safe-stack -fwarn-stack-size=1060 -S -o - -triple=i386-apple-darwin 2>&1 | FileCheck --check-prefix=IGNORE %s
+// RUN: %clang_cc1 %s -fsanitize=safe-stack -fwarn-stack-size=48 -S -o - 2>&1 | FileCheck --check-prefix=SAFESTACK %s
+// RUN: %clang_cc1 %s -fsanitize=safe-stack -fwarn-stack-size=1060 -S -o - 2>&1 | FileCheck --check-prefix=IGNORE %s
 
 extern void init(char *buf, int size);
 extern int use_buf(char *buf, int size);
 
 // REGULAR: warning: stack frame size ([[#]]) exceeds limit ([[#]]) in 'stackSizeWarning'
 // SAFESTACK: warning: stack frame size ([[#]]) exceeds limit ([[#]]) in 'stackSizeWarning'
 // IGNORE-NOT: stack frame size ([[#]]) exceeds limit ([[#]]) in 'stackSizeWarning'
 void stackSizeWarning() {
   char buf[1024];
   init(buf, sizeof(buf));
   if (buf[0] < 42)
     use_buf(buf, sizeof(buf));
 }