xfsprogs: update to 5.5

Reworked Makefile for consistency between packages.

Removed librt dependency. clock_gettime does not need it anymore.

Updated URL.

Add MAP_SYNC workaround as musl undefines MAP_SYNC for MIPS and PPC.

Refreshed patches and removed upstream ones

Signed-off-by: Rosen Penev <rosenp@gmail.com>

utils/xfsprogs/patches/140-mman.patch

@@ -0,0 +1,13 @@
+--- a/io/mmap.c
++++ b/io/mmap.c
+@@ -11,6 +11,10 @@
+ #include "init.h"
+ #include "io.h"
+ 
++#ifndef MAP_SYNC
++#define MAP_SYNC 0
++#endif
++
+ static cmdinfo_t mmap_cmd;
+ static cmdinfo_t mread_cmd;
+ static cmdinfo_t msync_cmd;