Fix the leakage of dma tags on if_arge.  The leak occur when arge_start()
add some packet(s) to tx ring and arge_stop() is called before receive the
sent packet interrupt from hardware.  Fix arge_stop() to unload the in use
dma tags and free the associated mbuf.

PR:		178319, 163670
Approved by:	adrian (mentor)
libc/stdio: Provide proper TAP output for fmemopen/open_[w]memstream.

A *.t file should provide Test Anything Protocol output so that it can be
run using the Perl "prove" tool.
libc/stdio: Run mkostemp test using prove.