Correctly override parallel recompilation flag for test case.

R=mstarzinger@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/12655006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@13915 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Rename android_build_type to android_webview_build.

Rename this gyp variable to something meaningful to better explain what
it actually does.

BUG=184431

Review URL: https://chromiumcodereview.appspot.com/12605007
Patch from Richard Coles <torne@chromium.org>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@13916 ce2b1a6d-e550-0410-aec6-3dcde31c8c00