Try to fix the test for Windows paths after r196859

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@196862 91177308-0d34-0410-b5e6-96231b3b80d8

test/Frontend/system-header-prefix.c

@@ -3,9 +3,9 @@
 #include "src/all.h"
 
 // CHECK-NOT: BOOST
-// CHECK: libs/mylib/warn.h:1:5: warning: 'MYLIB' is not defined, evaluates to 0
+// CHECK: libs{{/|\\}}mylib{{/|\\}}warn.h:1:5: warning: 'MYLIB' is not defined, evaluates to 0
 // CHECK-NOT: BOOST
-// CHECK: libs/mylib/warn.h:1:5: warning: 'MYLIB' is not defined, evaluates to 0
+// CHECK: libs{{/|\\}}mylib{{/|\\}}warn.h:1:5: warning: 'MYLIB' is not defined, evaluates to 0
 // CHECK-NOT: BOOST
-// CHECK: src/warn.h:1:5: warning: 'SRC' is not defined, evaluates to 0
+// CHECK: src{{/|\\}}warn.h:1:5: warning: 'SRC' is not defined, evaluates to 0
 // CHECK-NOT: BOOST