xbps-src: always create logs for configure/build/install stages in $wrksrc.

Fixed -C and install-destdir in the chroot, $# wasn't consistent :-)

xbps-src/shutils/pkgtarget_funcs.sh.in

@@ -96,22 +96,21 @@ install_pkg()
 	fi
 
 	# Install pkg into destdir.
-	env xbps_machine=${xbps_machine} MASTERDIR=${_MASTERDIR}	\
+	{ env xbps_machine=${xbps_machine} MASTERDIR=${_MASTERDIR}	\
+		dontrm_builddir=${dontrm_builddir}			\
 		${fakeroot_cmd} ${fakeroot_cmd_args}			\
 		@@XBPS_INSTALL_LIBEXECDIR@@/xbps-src-doinst-helper	\
-		${curpkgn} || exit $?
+		${curpkgn}; } || exit $?
 
 	# Always write metadata to package's destdir.
 	. $XBPS_SHUTILSDIR/metadata.sh
-	xbps_write_metadata_pkg
+	xbps_write_metadata_pkg || return $?
 
-	#
-	# Do not stow package if it wasn't requested.
-	#
-	if [ -z "$install_destdir_target" ]; then
-		. $XBPS_SHUTILSDIR/stow_funcs.sh
-		stow_pkg_handler stow
-	fi
+	[ "$install_destdir_target" = "yes" ] && return 0
+
+	# Stow package into masterdir.
+	. $XBPS_SHUTILSDIR/stow_funcs.sh
+	stow_pkg_handler stow
 }
 
 #