Rename check_call to check_call_out. It's a quite specific need when stderr is
needed or when the user doesn't want the default arguments of check_output.

R=dpranke@chromium.org
BUG=
TEST=

Review URL: http://codereview.chromium.org/6882127

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@83023 0039d316-1c4b-4281-b951-d872f2087c98