Use bits/mman-linux.h for hppa.

Use bits/mman-linux.h for hppa.

hppa currently has a bits/mman.h that does not include
bits/mman-linux.h, unlike all other architectures using the Linux
kernel.  This sort of variation between architectures is generally
unhelpful when making global changes for new constants added to new
Linux kernel releases.

This patch changes hppa to use bits/mman-linux.h, overriding constants
with different values as necessary (including with #undef after
bits/mman.h inclusion when needed, as already done for alpha).  While
there could possibly be further improvements through e.g. splitting
more sets of definitions into separate bits/ headers, I think this is
still an improvement on the current state.  diffstat shows 27 lines
added, 51 deleted (and some of that is actually existing lines moving
to a different place in the file).

Tested with build-many-glibcs.py for hppa-linux-gnu.

	* sysdeps/unix/sysv/linux/hppa/bits/mman.h: Include
	<bits/mman-linux.h>.
	(PROT_READ): Don't define here.
	(PROT_WRITE): Likewise.
	(PROT_EXEC): Likewise.
	(PROT_NONE): Likewise.
	(PROT_GROWSDOWN): Likewise.
	(PROT_GROWSUP): Likewise.
	(MAP_SHARED): Likewise.
	(MAP_PRIVATE): Likewise.
	[__USE_MISC] (MAP_SHARED_VALIDATE): Likewise.
	[__USE_MISC] (MAP_FILE): Likewise.
	[__USE_MISC] (MAP_ANONYMOUS): Likewise.
	[__USE_MISC] (MAP_ANON): Likewise.
	[__USE_MISC] (MAP_HUGE_SHIFT): Likewise.
	[__USE_MISC] (MAP_HUGE_MASK): Likewise.
	(MCL_CURRENT): Likewise.
	(MCL_FUTURE): Likewise.
	(MCL_ONFAULT): Likewise.
	[__USE_MISC] (MADV_NORMAL): Likewise.
	[__USE_MISC] (MADV_RANDOM): Likewise.
	[__USE_MISC] (MADV_SEQUENTIAL): Likewise.
	[__USE_MISC] (MADV_WILLNEED): Likewise.
	[__USE_MISC] (MADV_DONTNEED): Likewise.
	[__USE_MISC] (MADV_FREE): Likewise.
	[__USE_MISC] (MADV_REMOVE): Likewise.
	[__USE_MISC] (MADV_DONTFORK): Likewise.
	[__USE_MISC] (MADV_DOFORK): Likewise.
	[__USE_MISC] (MADV_HWPOISON): Likewise.
	[__USE_XOPEN2K] (POSIX_MADV_NORMAL): Likewise.
	[__USE_XOPEN2K] (POSIX_MADV_RANDOM): Likewise.
	[__USE_XOPEN2K] (POSIX_MADV_SEQUENTIAL): Likewise.
	[__USE_XOPEN2K] (POSIX_MADV_WILLNEED): Likewise.
	[__USE_XOPEN2K] (POSIX_MADV_DONTNEED): Likewise.
	(__MAP_ANONYMOUS): New macro.
	[__USE_MISC] (MAP_TYPE): Undefine and redefine after
	<bits/mman-linux.h> inclusion.
	(MAP_FIXED): Likewise.
	(MS_SYNC): Likewise.
	(MS_ASYNC): Likewise.
	(MS_INVALIDATE): Likewise.
	[__USE_MISC] (MADV_MERGEABLE): Likewise.
	[__USE_MISC] (MADV_UNMERGEABLE): Likewise.
	[__USE_MISC] (MADV_HUGEPAGE): Likewise.
	[__USE_MISC] (MADV_NOHUGEPAGE): Likewise.
	[__USE_MISC] (MADV_DONTDUMP): Likewise.
	[__USE_MISC] (MADV_DODUMP): Likewise.
	[__USE_MISC] (MADV_WIPEONFORK): Likewise.
	[__USE_MISC] (MADV_KEEPONFORK): Likewise.