[Builtin][AArch64] Fix build errors of test cases

[weimingz]

Summary

{mul,sub}tf3_test.c have build errors [1] because macro "COMPILER_RT_ABI" is defined in "int_lib.h", which should be included in test cases.

[1] http://lab.llvm.org:8011/builders/clang-cmake-aarch64-39vma/builds/4861/steps/ninja%20check%201/logs/FAIL%3A%20Builtins-aarch64-linux%3A%3A%20multf3_test.c

[jroelofs]

LGTM

[weimingz]

This comment was removed by weimingz.

[weimingz]

(sorry, please ignore the update)

test/builtins/Unit/multf3_test.c

 // This file tests __multf3 for the compiler_rt library.
 //
 //===----------------------------------------------------------------------===//
 
 #include <stdio.h>
 
 #if __LDBL_MANT_DIG__ == 113
 
+#include "int_lib.h"
 #include "fp_test.h"
 
 // Returns: a * b
 COMPILER_RT_ABI long double __multf3(long double a, long double b);
 
 int test__multf3(long double a, long double b,
                  uint64_t expectedHi, uint64_t expectedLo)
 {

test/builtins/Unit/subtf3_test.c

 // This file tests __subtf3 for the compiler_rt library.
 //
 //===----------------------------------------------------------------------===//
 
 #include <stdio.h>
 
 #if __LDBL_MANT_DIG__ == 113
 
+#include "int_lib.h"
 #include "fp_test.h"
 
 // Returns: a - b
 COMPILER_RT_ABI long double __subtf3(long double a, long double b);
 
 int test__subtf3(long double a, long double b,
                  uint64_t expectedHi, uint64_t expectedLo)
 {