Added multilib, multilib/nonfree and debug repositories by default.

- multilib: to store 32bit packages.
- multilib/nonfree: to store nonfree 32bit packages.
- debug: to store debug packages.

common/xbps-src/chroot/repos-local.conf

@@ -1,3 +1,6 @@
 # Local repositories
 repository=/host/binpkgs
 repository=/host/binpkgs/nonfree
+repository=/host/binpkgs/multilib
+repository=/host/binpkgs/multilib/nonfree
+repository=/host/binpkgs/debug

common/xbps-src/chroot/repos-remote.conf

@@ -1,3 +1,5 @@
 # Remote repositories
 repository=http://repo.voidlinux.eu/current
 repository=http://repo.voidlinux.eu/current/nonfree
+repository=http://repo.voidlinux.eu/current/multilib
+repository=http://repo.voidlinux.eu/current/multilib/nonfree