Add a missing "REQUIRES: system-windows" to a Windows-only test.

This un-breaks builds on other platforms. Otherwise, they fail due to warnings like:

warning: unable to find a Visual Studio installation; try running Clang from a developer command prompt [-Wmsvc-not-found]
llvm-svn: 317716

diff --git a/clang/test/Driver/coverage.c b/clang/test/Driver/coverage.c
index 339c4a3..9cfba81 100644 (file)
--- a/clang/test/Driver/coverage.c
+++ b/clang/test/Driver/coverage.c
@@ -1,4 +1,5 @@
 // Test coverage flag.
+// REQUIRES: system-windows
 //
 // RUN: %clang_cl -### -coverage %s -o foo/bar.o 2>&1 | FileCheck -check-prefix=CLANG-CL-COVERAGE %s
 // CLANG-CL-COVERAGE-NOT: error: