criu/build: include msg.mk in files that use msg-*

This patch fixes accidental dropping of msg-gen, msg-link messages.
Just run make with another warn enabled:
[criu]$ make --warn-undefined-variable 2>&1 | grep msg
  PBCC     images/ipc-msg.pb-c.c
  DEP      images/ipc-msg.pb-c.d
  CC       images/ipc-msg.o
Makefile.config:17: warning: undefined variable 'msg-gen'
Makefile.version:20: warning: undefined variable 'msg-gen'
Makefile:120: warning: undefined variable 'msg-link'
Makefile:149: warning: undefined variable 'msg-link'
Makefile:15: warning: undefined variable 'msg-gen'
Acked-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

criu/Makefile

@@ -84,6 +84,9 @@ ifneq ($(filter ia32 x86 ppc64,$(ARCH)),)
         endif
 endif
 
+# msg-* printing
+include $(__nmk_dir)/msg.mk
+
 #
 # Version header file.
 include Makefile.version

criu/Makefile.config

 include $(__nmk_dir)/utils.mk
+include $(__nmk_dir)msg.mk
 include ../scripts/feature-tests.mak
 
 CONFIG_HEADER := include/config.h

criu/Makefile.version

+include $(__nmk_dir)msg.mk
+
 CRTOOLSVERSION		:= $(VERSION_MAJOR)$(if $(VERSION_MINOR),.$(VERSION_MINOR))$(if $(VERSION_SUBLEVEL),.$(VERSION_SUBLEVEL))
 VERSION_HEADER		:= include/version.h
 GITID_FILE		:= ../.gitid

lib/pycriu/images/Makefile

+include $(__nmk_dir)msg.mk
 all: pb.py images magic.py
 
 .PHONY: all images clean pb.py