[gcc/wschmidt/heads/builtins10] rs6000: Enable the new builtin support

[William Schmidt]

The branch 'wschmidt/heads/builtins10' was updated to point to:

 61bece8ded3... rs6000: Enable the new builtin support

It previously pointed to:

 1f3eee9c45e... rs6000: **split and squash me**

Diff:

!!! WARNING: THE FOLLOWING COMMITS ARE NO LONGER ACCESSIBLE (LOST):
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  1f3eee9... rs6000: **split and squash me**