Follow Jordan's advice and use {{^}} and {{$}} for this test

This is a better way of ensuring that we match the output of the
rewriter and not the CHECK line.

llvm-svn: 179308

clang/test/Frontend/rewrite-macros.c

@@ -6,16 +6,16 @@
 
 #define A(a,b) a ## b
 
-// CHECK: 12{{ *}}/*A*/ /*(1,2)*/
+// CHECK: {{^}} 12 /*A*/ /*(1,2)*/{{$}}
 A(1,2)
 
-// CHECK: /*_Pragma("{{mark}}")*/
+// CHECK: {{^}} /*_Pragma("mark")*/{{$}}
 _Pragma("mark")
 
-// CHECK: /*#warning {{eek}}*/
+// CHECK: /*#warning eek*/{{$}}
 /* expected-warning {{eek}} */ #warning eek
 
-// CHECK: //#pragma mark {{mark}}
+// CHECK: {{^}}//#pragma mark mark{{$}}
 #pragma mark mark