Enable 'release' and 'vbump' targets directly in mkit/make

Usage of GNU Make really is just a sugar, so we should enable all
targets also for direct mkit/make invocation.

src/include/mkit.sh

     echo debstuff
     echo dist
     echo install
+    echo release
     echo release_x
     echo release_y
     echo release_z
     echo rpmstuff
     echo uninstall
+    echo vbump
     echo vbump_x
     echo vbump_y
     echo vbump_z

src/include/release.sh

         '
 }
 
+release() {
+    #
+    # Perform release on Z level
+    #
+    _release z
+}
+
 release_x() {
     #
     # Perform release on X level
     _release z
 }
 
+vbump() {
+    #
+    # Perform version bump on Z level
+    #
+    _vbump z
+}
+
 vbump_x() {
     #
     # Perform version bump on X level

src/mkit.mk

 	@$(MKIT_DIR)/make install
 
 release:
-	@$(MKIT_DIR)/make release_z
+	@$(MKIT_DIR)/make release
 
 release_x:
 	@$(MKIT_DIR)/make release_x
 	@$(MKIT_DIR)/make uninstall
 
 vbump:
-	@$(MKIT_DIR)/make vbump_z
+	@$(MKIT_DIR)/make vbump
 
 vbump_x:
 	@$(MKIT_DIR)/make vbump_x
 vbump_z:
 	@$(MKIT_DIR)/make vbump_z
 
-.PHONY: all clean dist rpmstuff install uninstall release_x release_y release_z vbump_x vbump_y vbump_z
+.PHONY: all clean dist rpmstuff install uninstall release release_x release_y release_z vbump vbump_x vbump_y vbump_z