ninja: Hash another part of rsp file names to shorten file name length
ninja: Hash another part of rsp file names to shorten file name length

BUG=chromium:148829
Review URL: https://codereview.chromium.org/10905247
old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google