Add some test failures to report

Author: DavidSpickett

clang/test/Sema/asm.c

@@ -15,7 +15,7 @@ void f(void) {
   asm ("foo\n" : "=a" (i) : "[symbolic_name]" (i)); // expected-error {{invalid input constraint '[symbolic_name]' in asm}}
 
   asm ("foo\n" : : "" (i)); // expected-error {{invalid input constraint '' in asm}}
-  asm ("foo\n" : "=a" (i) : "" (i)); // expected-error {{invalid input constraint '' in asm}}
+  asm ("foo\n" : "=a" (i) : "" (i)); // expected-error {{this will fail}}
 }
 
 void clobbers(void) {

llvm/test/MC/AArch64/label-arithmetic-diags-elf.s

@@ -85,3 +85,4 @@ end_across_sec:
   // CHECK: :[[@LINE-1]]:{{[0-9]+}}: error: Cannot represent a difference across sections
   // CHECK-NEXT: cmp w0, #(sec_y - sec_x)
   // CHECK-NEXT: ^
+  // CHECK-NEXT: this will fail