Patch - Add restrict to signal.h

[Joel Sherrill <joel dot sherrill at oarcorp dot com>]

Hi

Another patch in the Google Code-In restrict series.

Just to note publicly, once this is committed, there is
a corresponding patch to the RTEMS signal code to
add restrict which will need to be applied.

OK to commit?

2013-11-20  Bryan Dunsmore <dunsmoreb@gmail.com>

        * libc/include/sys/signal.h, libc/machine/cris/sys/signal.h,
        libc/posix/un-namespace.h, libc/sys/rtems/crt0.c: Add restrict
        keyword.


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joel.sherrill@OARcorp.com        On-Line Applications Research
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