Make it possible to install 'custom-install' pkgs without distfiles.

Make xbps-base-{chroot,system} install the lib -> lib64 symlinks on
x86_64.

--HG--
extra : convert_revision : 9404d50c8a15dcd700df49aace1bbd105749f00a

templates/xbps-base-chroot.tmpl

@@ -1,7 +1,7 @@
 # Template file for 'xbps-base-chroot'
 pkgname=xbps-base-chroot
-version=0.3
-build_style=meta-template
+version=0.4
+build_style=custom-install
 short_desc="xbps base packages for the chroot target"
 maintainer="Juan RP <xtraeme@gmail.com>"
 long_desc="
@@ -16,3 +16,15 @@ build_depends="glibc-2.8 kernel-libc-headers-2.6.27.3 bash-3.2 coreutils-6.12
  sed-4.1.5 make-3.81 diffutils-2.8.1 file-4.26 proplib-0.1 patch-2.5.4
  wget-1.11.4 dash-0.5.4"
 run_depends="$build_depends"
+
+do_install()
+{
+	local destdir=$XBPS_DESTDIR/$pkgname-$version
+
+	if [ "$xbps_machine" = "x86_64" ]; then
+		mkdir -p $destdir/usr/lib
+		mkdir -p $destdir/lib
+		cd $destdir && ln -s lib lib64
+		cd $destdir/usr && ln -s lib lib64
+	fi
+}