make: aidl: Add explicit dependency on the aidl binary am: 39756c7379

Original change: https://android-review.googlesource.com/c/trusty/lib/+/3449400

Change-Id: Ica3944ff60954362e574c5b74a1f671bd97bc1ad
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

make/aidl.mk

diff --git a/make/aidl.mk b/make/aidl.mk
index e2e082b..296ff4c 100644
--- a/make/aidl.mk
+++ b/make/aidl.mk
@@ -80,7 +80,7 @@
 $(AIDL_SRCS): MODULE_AIDL_LANGUAGE := $(MODULE_AIDL_LANGUAGE)
 $(AIDL_SRCS): MODULE_AIDL_PACKAGE := $(MODULE_AIDL_PACKAGE)
 $(AIDL_SRCS): MODULE := $(MODULE)
-$(AIDL_SRCS): $(BUILDDIR)/%.$(AIDL_EXT): %.aidl
+$(AIDL_SRCS): $(BUILDDIR)/%.$(AIDL_EXT): %.aidl $(AIDL_TOOL)
 	@$(MKDIR)
 	@if [ -n "$(AIDL_HEADER_DIR)" ]; then mkdir -p $(AIDL_HEADER_DIR); fi
 	@$(call ECHO,$(MODULE),generating from AIDL,$@)