[1.8>1.9] [MERGE #4556 @MikeHolman] disable timing out test on osx

Merge pull request #4556 from MikeHolman:disableslowosx

It's a slow test in general and the OSX machines are very slow so this is timing out.

Author: MikeHolman

test/AsmJs/rlexe.xml

@@ -978,7 +978,7 @@
       <compile-flags>-testtrace:asmjs -args 14000 -endargs -EnableFatalErrorOnOOM-</compile-flags>
       <!-- todo:: On unix platforms there is more stack available,
            so we need to find the right limit to test in order to not timeout -->
-      <tags>exclude_dynapogo</tags>
+      <tags>exclude_dynapogo,exclude_mac</tags>
     </default>
   </test>
   <test>