xbps-src: infrastructure changes required for "nonfree" keyword in tmpls.

- The chroot target now execs masterdir/bin/xbps-shell to set up correct envvars.
- 2 pkgs are now in nonfree repo: adobe-flash-plugin and jre.
- Renamed some vars in xbps-src to be in uppercase, notably XBPS_MACHINE.
- make-repoidx target now creates the index for all "known" directories specified
  via XBPS_PACKAGESDIR: XBPS_MACHINE, noarch, and nonfree/XBPS_MACHINE.

xbps-src/shutils/init_funcs.sh.in

@@ -25,13 +25,11 @@
 
 set_defvars()
 {
-	local DDIRS i instsharedir
+	local DDIRS i
 
-	instsharedir=@@XBPS_INSTALL_SHAREDIR@@
-
-	XBPS_HELPERSDIR=$instsharedir/helpers
-	XBPS_SHUTILSDIR=$instsharedir/shutils
-	XBPS_COMMONVARSDIR=$instsharedir/common
+	XBPS_HELPERSDIR=@@XBPS_INSTALL_SHAREDIR@@/helpers
+	XBPS_SHUTILSDIR=@@XBPS_INSTALL_SHAREDIR@@/shutils
+	XBPS_COMMONVARSDIR=@@XBPS_INSTALL_SHAREDIR@@/common
 	XBPS_META_PATH=$XBPS_MASTERDIR/var/db/xbps
 	XBPS_PKGMETADIR=$XBPS_META_PATH/metadata
 	XBPS_SRCPKGDIR=$XBPS_DISTRIBUTIONDIR/srcpkgs
@@ -70,8 +68,8 @@ set_defvars()
 		fi
 	done
 
-	xver=$(xbps-bin.static -V|awk '{print $2}')
-	case "${xver}" in
+	export XBPS_VERSION=$(xbps-bin.static -V|awk '{print $2}')
+	case "${XBPS_VERSION}" in
 	0.1[0-9].[0-9]*)
 		xbps_conf="-C $XBPS_MASTERDIR/usr/local/etc/xbps"
 		;;