swift

87925d5c - Revert "Set the Compilation directory when generating the Skeleton CU"

Revert "Set the Compilation directory when generating the Skeleton CU" This reverts commit b286b1c3a5ac3c60596b4472ee8b68895dd060ec. Reverted because fix for rdar://131726681 broke rdar://154247270 Reverting and will try to fix properly later. We will not land this in 6.2 (cherry picked from commit 5b4fdd6e62bb4c86dacdb082d4ca9fbff3752bd8)