BuildSystem: fix darwin/xcode to avoid double-configure/build after svn up
- build system automagically rebuilds certain files from libhb upwards after
an svn up to maintain accurate repository information in binaries; if building
with xcode the process was inadvertantly repeated on subsequent 'make'.
- enhanced make/xcodemake to record the user's environment when shunted through
xcode. this should help in diagnosing build issues from Xcode.app in the future.
git-svn-id: svn://localhost/HandBrake/trunk@2344
b64f7644-9d1e-0410-96f1-
a4d463321fa5
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