Add missing dependencies of fs-verity manifest APK

Otheriwse, the build complains about missing files when
PRODUCT_SYSTEM_FSVERITY_GENERATE_METADATA is enabled (aosp/1937717).

Bug: 206326351
Test: clobber, set PRODUCT_SYSTEM_FSVERITY_GENERATE_METADATA := true, build
Change-Id: I11d18914d63cab0b84ae711f2334747cb26ca234
diff --git a/core/Makefile b/core/Makefile
index f33307d..aaf2ba4 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -2789,7 +2789,8 @@
 $(FSVERITY_APK_OUT): $(HOST_OUT_EXECUTABLES)/fsverity_manifest_generator \
     $(HOST_OUT_EXECUTABLES)/fsverity $(HOST_OUT_EXECUTABLES)/aapt2 \
     $(HOST_OUT_EXECUTABLES)/apksigner $(FSVERITY_APK_MANIFEST_PATH) \
-    $(FSVERITY_APK_KEY_PATH).x509.pem $(FSVERITY_APK_KEY_PATH).pk8
+    $(FSVERITY_APK_KEY_PATH).x509.pem $(FSVERITY_APK_KEY_PATH).pk8 \
+    $(fsverity-metadata-targets)
 	$< --fsverity-path $(PRIVATE_FSVERITY) --aapt2-path $(PRIVATE_AAPT2) \
 	    --apksigner-path $(PRIVATE_APKSIGNER) --apk-key-path $(PRIVATE_KEY) \
 	    --apk-manifest-path $(PRIVATE_MANIFEST) --output $@ \