Set proper flags when cross-compiling with separate toolsets.

Currently, this is only done by standalone-V8 which already sets the correct
flags. However, when ICU is compiled within chromium for V8, we need to set
the correct flags ourselves.

BUG=none
R=bauerb@chromium.org

Review URL: https://codereview.chromium.org/19780003

git-svn-id: http://src.chromium.org/svn/trunk/deps/third_party/icu46@212871 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
1 file changed