tests: run Misc/stats_dir_profiler.swift only on macos and linux

It's good enough to run the test on macOS and linux.
The test takes very long on Windows because the * may expand to a path longer than 260 characters.

Author: eeckstein

test/Misc/stats_dir_profiler.swift

@@ -4,11 +4,14 @@
 // RUN: %target-swiftc_driver -o %t/main -module-name main -stats-output-dir %t/stats-events %s -profile-stats-events -Xfrontend -fine-grained-timers
 // RUN: %target-swiftc_driver -o %t/main -module-name main -stats-output-dir %t/stats-entities %s -profile-stats-entities -Xfrontend -fine-grained-timers
 
-// Need to use %long-tmp because in Windows the * may expand to a path longer
-// than 260 characters.
 // RUN: %FileCheck -check-prefix=EVENTS -input-file %long-tmp/stats-events/*.dir/Time.User.events %s
 // RUN: %FileCheck -check-prefix=ENTITIES -input-file %long-tmp/stats-entities/*.dir/Time.User.entities %s
 
+// It's good enough to run the test on macOS and linux.
+// It takes very long on Windows because the * may expand to a path longer than 260 characters.
+
+// REQUIRES: OS=macosx || OS=linux-gnu
+
 // EVENTS: {{perform-sema;.*;typecheck-decl.* [0-9]+}}
 // ENTITIES: {{perform-sema;.*;TypeCheckFunctionBodyRequest bar\(\);typecheck-stmt.* [0-9]+}}