[builtins][compiler-rt][ARM] re-enable test mulsc3

[peter.smith]

Summary

The mulsc3_test.c is currently disabled with the comment citing PR32475. For me the test is passing for both Arm and Thumb, hard and soft float so I think we can re-enable it. The original cause of the failure should be fixed by D35538.

Note that PR number is slightly wrong as the 7 and 5 are transposed. The original bug should be https://bugs.llvm.org/show_bug.cgi?id=32457

[efriedma]

LGTM. (I haven't tested, but if it actually still isn't working, we want to know.)

[peter.smith]

Thanks for the review. I've tested it locally; with luck it won't show up any problems in configurations I haven't covered. I'll revert and investigate if it causes any problem.

compiler-rt/trunk/test/builtins/Unit/mulsc3_test.c

 // RUN: %clang_builtins %s %librt -lm -o %t && %run %t
-// UNSUPPORTED: armhf-target-arch
-// see pr 32475.
 //===-- mulsc3_test.c - Test __mulsc3 -------------------------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is dual licensed under the MIT and the University of Illinois Open
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//