[libFuzzer] Fix failing test: sigint.test

Summary:
Fix sigint.test by making it require msan rather
than enumerating unsupported platforms.

Reviewers: kcc

Reviewed By: kcc

Subscribers: #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D61353

llvm-svn: 359638

compiler-rt/test/fuzzer/sigint.test

@@ -1,6 +1,4 @@
-# FIXME: Disabled on Windows for now because of reliance on posix only features
-# (eg: export, "&", pkill).
-UNSUPPORTED: darwin, windows
+REQUIRES: msan
 
 # Check that libFuzzer exits gracefully under SIGINT with MSan.
 RUN: rm -rf %t