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- only include cflags/linkflags and other compiler settings that are target-specific when building for 'target'
- make build tools (protoc) compile for 'host', and change the dependencies on them to reflect that.

Review URL: http://codereview.chromium.org/265031

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@30381 0039d316-1c4b-4281-b951-d872f2087c98