[wasm] Turn on tests for multiple returns on Windows

R=clemensh@chromium.org

Change-Id: Id2978d2c37a5fb4191db285f4660e22472b70f9d
Reviewed-on: https://chromium-review.googlesource.com/836427Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50225}

test/cctest/cctest.status

@@ -173,12 +173,6 @@
 ['arch == arm or arch == arm64 or arch == mips or arch == mips64 or arch == mipsel or arch == mips64el or arch == s390 or arch == s390x or arch == ppc or arch == ppc64', {
   'test-multiple-return/*': [SKIP],
 }],
-['system == windows and arch == x64', {
-  'test-multiple-return/ReturnMultipleInt32': [SKIP],
-  'test-multiple-return/ReturnMultipleInt64': [SKIP],
-  'test-multiple-return/ReturnMultipleFloat32': [SKIP],
-  'test-multiple-return/ReturnMultipleFloat64': [SKIP],
-}],
 
 ##############################################################################
 ['asan == True', {