Turn on want_separate_host_toolset on by default, as it's on by default in chrome

BUG=none
R=torne@chromium.org

Review URL: https://codereview.chromium.org/19485007

git-svn-id: http://src.chromium.org/svn/trunk/deps/third_party/icu46@213076 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
1 file changed