Make clang -cc1 disable Objective-C exceptions by default, and add a -fobjc-exceptions flag to turn them on.

Update all tests accordingly.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126177 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/SemaObjC/no-objc-exceptions.m b/test/SemaObjC/no-objc-exceptions.m
index 78419a2..d47f51a 100644
--- a/test/SemaObjC/no-objc-exceptions.m
+++ b/test/SemaObjC/no-objc-exceptions.m
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -fno-objc-exceptions -fsyntax-only -verify %s
+// RUN: %clang_cc1 -fsyntax-only -verify %s
 
 void f() {
   @throw @"Hello"; // expected-error {{cannot use '@throw' with Objective-C exceptions disabled}}