MAP_SHARED_VALIDATE is completely missing.

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

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>

Does not seem to be appropriate there.

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