Try to fix the clang make build configuration.
Try to fix the clang make build configuration.

CC.host and CXX.host are not valid env variable names and need
to be passed on the command line as in "make CC.host=$CC".
Review URL: http://codereview.chromium.org/7482014

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@93504 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build