Define UNLOCALIZED_RESOURCES_FOLDER_PATH and use $(abs_builddir) when writing Xcode ENV vars.
Define UNLOCALIZED_RESOURCES_FOLDER_PATH and use $(abs_builddir) when writing Xcode ENV vars.

The Xcode build driver passes absolute paths to all of its subjobs, so some of
the scripts and the tools called from those scripts (e.g. defaults) require
absolute paths. This keeps the use of relative paths in the Makefiles, but
uses absolute ones when calling scripts Xcode-style.

BUG=chromium:94006
TEST=Build Chromium after r97984 with Make.
Review URL: http://codereview.chromium.org/7715040
old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google