MFH: r355461

Makefile.common: Move a few other variables outside the NO_BUILD block.

Just setting USES=tar:bzip2 is not enough, as ports such as
graphics/kipi-plugin-facebook would still report an invalid distfile if
NO_BUILD was passed.

We now unconditionally set DISTNAME, DISTINFO_FILE and LICENSE besides USES.

Approved by:	portmgr (bapt)