matchbox: fix dependency to not always rebuilt libmatchbox

Real targets should not depend on phony targets, otherwise they get
rebuilt every time.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/matchbox/matchbox.mk

@@ -219,7 +219,7 @@ else
 endif
 
 
-$(MATCHBOX_LIB_DIR)/.configured: $(MATCHBOX_LIB_DIR)/.unpacked xlib_libXext-install-staging
+$(MATCHBOX_LIB_DIR)/.configured: $(MATCHBOX_LIB_DIR)/.unpacked
 	(cd $(MATCHBOX_LIB_DIR); rm -f config.cache; \
 	$(TARGET_CONFIGURE_OPTS) \
 	./configure $(QUIET) \
@@ -610,7 +610,7 @@ $(TARGET_DIR)/usr/bin/$(MATCHBOX_KB_BIN): $(STAGING_DIR)/usr/bin/$(MATCHBOX_KB_B
 	cp -af $(STAGING_DIR)/usr/share/matchbox/matchbox-keyboard $(TARGET_DIR)/usr/share/matchbox/
 	cp -dpf ./package/matchbox/mb-applet-kbd-wrapper.sh $(TARGET_DIR)/usr/bin/
 
-matchbox: host-pkg-config expat $(MATCHBOX_WM_DEPS) $(MATCHBOX_SNOTIFY_DEPS) $(MATCHBOX_LIB_DEPS) $(TARGET_DIR)/usr/lib/libmb.so $(TARGET_DIR)/usr/bin/$(MATCHBOX_WM_BIN)
+matchbox: host-pkg-config expat xlib_libXext $(MATCHBOX_WM_DEPS) $(MATCHBOX_SNOTIFY_DEPS) $(MATCHBOX_LIB_DEPS) $(TARGET_DIR)/usr/lib/libmb.so $(TARGET_DIR)/usr/bin/$(MATCHBOX_WM_BIN)
 
 matchbox-panel: matchbox $(TARGET_DIR)/usr/bin/$(MATCHBOX_PL_BIN) $(TARGET_DIR)/usr/bin/matchbox-session $(MATCHBOX_PANEL_DEPS)