* sysdeps/i386/pt-machine.h: Add testandset and __compare_and_swap
prototpyes.
* sysdeps/alpha/pt-machine.h: Likewise.
* sysdeps/arm/pt-machine.h: Likewise.
* sysdeps/cris/pt-machine.h: Likewise.
* sysdeps/hppa/pt-machine.h: Likewise.
* sysdeps/i386/i686/pt-machine.h: Likewise.
* sysdeps/ia64/pt-machine.h: Likewise.
* sysdeps/m68k/pt-machine.h: Likewise.
* sysdeps/mips/pt-machine.h: Likewise.
* sysdeps/powerpc/pt-machine.h: Likewise.
* sysdeps/s390/s390-32/pt-machine.h: Likewise.
* sysdeps/s390/s390-64/pt-machine.h: Likewise.
* sysdeps/sh/pt-machine.h: Likewise.
* sysdeps/sparc/sparc32/pt-machine.h: Likewise.
* sysdeps/sparc/sparc64/pt-machine.h: Likewise.
* sysdeps/x86_64/pt-machine.h: Likewise.
* internals.h: Move testandset and __compare_and_swap prototypes
to pt-machine.h.