Move <bits/mman-linux.h> to the Linux sysdeps directory

The header file is no longer used on anything but Linux.

ChangeLog

@@ -1,3 +1,11 @@
+2017-11-07  Florian Weimer  <fweimer@redhat.com>
+
+	* bits/mman-linux.h: Move ...
+	* sysdeps/unix/sysv/linux/bits/mman-linux.h: ... here.  Update
+	comment.
+	* sysdeps/unix/sysv/linux/bits/Makefile (sysdep_headers): Remove
+	outdated comment.
+
 2017-11-07  Rajalakshmi Srinivasaraghavan  <raji@linux.vnet.ibm.com>
 
 	* sysdeps/powerpc/powerpc64/multiarch/strcasestr-power8.S (STRNLEN):

sysdeps/unix/sysv/linux/Makefile

@@ -28,13 +28,6 @@ CFLAGS-open_by_handle_at.c = -fexceptions -fasynchronous-unwind-tables
 CFLAGS-sync_file_range.c = -fexceptions -fasynchronous-unwind-tables
 CFLAGS-tst-writev.c += "-DARTIFICIAL_LIMIT=(0x80000000-sysconf(_SC_PAGESIZE))"
 
-# Note that bits/mman-linux.h is listed here though the file lives in the
-# top-level bits/ subdirectory instead of here in sysdeps/.../linux/bits/.
-# That is just so that other (non-Linux) configurations for whom the
-# bits/mman-linux.h definitions work well do not have to duplicate the
-# contents of the file.  The file must still be listed in sysdep_headers
-# here and in any non-Linux configuration that uses it; other
-# configurations will not install the file.
 sysdep_headers += sys/mount.h sys/acct.h sys/sysctl.h \
 		  sys/klog.h \
 		  sys/user.h sys/prctl.h \

sysdeps/unix/sysv/linux/bits/mman-linux.h

@@ -21,10 +21,7 @@
 #endif
 
 /* The following definitions basically come from the kernel headers.
-   But the kernel header is not namespace clean.
+   But the kernel header is not namespace clean.  */
-
-   This file is also used by some non-Linux configurations of the
-   GNU C Library, for other systems that use these same bit values.  */
 
 
 /* Protections are chosen from these bits, OR'd together.  The