Add xbps-0.59.1.

This also required

- merging of usr/sbin and usr/bin (which should be done anyway), because
  of a dodgy PATH searcher
- moving of zlib earlier.

sysc/run2.sh

@@ -58,6 +58,10 @@ build libarchive-3.5.2
 
 build openssl-1.1.1l
 
+build zlib-1.2.11
+
+build xbps-0.59.1
+
 build automake-1.16.3
 
 build autoconf-2.71
@@ -68,8 +72,6 @@ build gettext-0.21
 
 build texinfo-6.7
 
-build zlib-1.2.11
-
 build gcc-4.7.4
 
 build gperf-3.1