Edit some comments slightly. Set OS (build OS) and ARCH (target arch) based on the proper elements (SYSTEM,  and CPU, respectively) of the CPU-COMPANY-SYSTEM tuples. Add OS and ARCH settings for PowerPC/Darwin (Mac OS X).
Edit some comments slightly.
Set OS (build OS) and ARCH (target arch) based on the proper elements (SYSTEM,
 and CPU, respectively) of the CPU-COMPANY-SYSTEM tuples.
Add OS and ARCH settings for PowerPC/Darwin (Mac OS X).


git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@10047 91177308-0d34-0410-b5e6-96231b3b80d8

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