While building arm hardfp chrome browser, remove "-mfloat-abi=hard" from host compiler cflags, which causes building chrome browser failure.

BUG=https://code.google.com/p/chrome-os-partner/issues/detail?id=8539
TEST=manually build chrome browser use "hard"

Review URL: https://chromiumcodereview.appspot.com/9810036
Patch from Han Shen <shenhan@google.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11160 ce2b1a6d-e550-0410-aec6-3dcde31c8c00