Collect garbage at the beginning of cctest/test-cpu-profiler/FunctionCallSample
Collect garbage at the beginning of cctest/test-cpu-profiler/FunctionCallSample

That way, we don't end up collecting all samples in the garbage
collector when the i18n extension is loaded.

BUG=v8:2745
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/18714006

git-svn-id: b158db1e4b4ab85d4c9e510fdef4b1e8c614b15b@15547 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh