Convert all xbps-base-chroot pkgs to subpkgs.

Also introduce "libs.depends", that adds a rundep of a package
with a proper version. This is to avoid modifying all dependent
packages if there's an API/ABI change.

--HG--
extra : convert_revision : a46b11b8e9187bdb2bfc954ad5ff40ecd9c0fe31

templates/diffutils/template

@@ -1,5 +1,6 @@
 # Template file for 'diffutils'
 pkgname=diffutils
+sourcepkg=diffutils
 version=2.8.1
 distfiles="http://ftp.gnu.org/gnu/$pkgname/$pkgname-$version.tar.gz"
 build_style=gnu_configure
@@ -12,5 +13,5 @@ long_desc="
  faster. Cmp has been moved into this package from the GNU textutils package.
  These programs are usually used for creating patch files."
 
-base_chroot=yes 
-run_depends="glibc-2.8"
+base_chroot=yes
+subpackages="base docs locale"