linux: Fix integer overflow warnings when including <sys/mount.h> [BZ #32708]

Using gcc -Wshift-overflow=2 -Wsystem-headers to compile a file including <sys/mount.h> will cause a warning since 1 << 31 is undefined behavior on platforms where int is 32-bits. Signed-off-by: Collin Funk <collin.funk1@gmail.com> Tested-by: Carlos O'Donell <carlos@redhat.com> Reviewed-by: Carlos O'Donell <carlos@redhat.com>

Author: collinfunk

sysdeps/unix/sysv/linux/sys/mount.h

@@ -121,7 +121,7 @@ enum
  MS_ACTIVE = 1 << 30,
 #define MS_ACTIVE	MS_ACTIVE
 #undef MS_NOUSER
- MS_NOUSER = 1 << 31
+ MS_NOUSER = 1U << 31
 #define MS_NOUSERMS_NOUSER
 };