Revert "Allow 'make distclean' to clean up the 'generated' phar.inc"

This reverts commit 017145bc57e604153f2a2400dd6e73a397f52f96.
Merge branch 'PHP-5.5'

* PHP-5.5:
  Revert "Allow 'make distclean' to clean up the 'generated' phar.inc"