fix breakage from introducing bits header for sys/io.h
authorRich Felker <dalias@aerifal.cx>
Mon, 19 Nov 2012 00:58:15 +0000 (19:58 -0500)
committerRich Felker <dalias@aerifal.cx>
Mon, 19 Nov 2012 00:58:15 +0000 (19:58 -0500)
apparently some other archs have sys/io.h and should not break just
because they don't have the x86 port io functions. provide a blank
bits/io.h everywhere for now.


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