Original Commit Message:
  In the test-run-wasm and test-run-wasm-64 cctests it is not possible to
  call runtime functions. To test traps in these cctests we therefore
  replace the runtime call with a call to a c-callback, followed by a
  return. This CL fixes the problem that the return did not clean up stack
  parameters.

R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Change-Id: Ia6b95141341635b769acf12b82b4524a56b12b94
Reviewed-on: https://chromium-review.googlesource.com/698424Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#48271}