tools: Makefile: fix lack of dependence for acrm_mngr.h

$(OUT_DIR)/acrm_mngr.h miss dependence of ./acrm_mngr.h, that can
cause build problems.
DM & SOS-LCS are built with $(OUT_DIR)/acrm_mngr.h, which is a
copy of tools/acrn-manager/acrm_mngr.h. So when
tools/acrn-manager/acrm_mngr.h is modified, $(OUT_DIR)/acrm_mngr.h
should be updated too.

Acked-by: Yan Like <like.yan@intel.com>
Signed-off-by: Tao Yuhong <yuhong.tao@intel.com>

Author: taoyuhong

tools/acrn-manager/Makefile

@@ -22,7 +22,7 @@ $(OUT_DIR)/libacrn-mngr.a: acrn_mngr.c acrn_mngr.h
 	ar -cr $@ $(OUT_DIR)/acrn_mngr.o
 
 ifneq ($(OUT_DIR),.)
-$(OUT_DIR)/acrn_mngr.h:
+$(OUT_DIR)/acrn_mngr.h: ./acrn_mngr.h
 	cp ./acrn_mngr.h $(OUT_DIR)/
 endif