tools/findutils: include sysmacros.h explicitly

glibc is moving to remove the include of sys/sysmacros.h from
sys/types.h, and some distros have done this early. Other libcs may
already lack this include. Include sysmacros.h explicitly.

Fixes: FS#1016

Signed-off-by: Alex Maclean <monkeh@monkeh.net>

tools/findutils/patches/100-include_sysmacros.patch

@@ -0,0 +1,13 @@
+--- a/gl/lib/mountlist.c
++++ b/gl/lib/mountlist.c
+@@ -17,6 +17,10 @@
+ 
+ #include <config.h>
+ 
++#ifdef MAJOR_IN_SYSMACROS
++# include <sys/sysmacros.h>
++#endif
++
+ #include "mountlist.h"
+ 
+ #include <limits.h>