Make installed-files-recovery.txt depend on rsync timestamp

Files are copied into the recovery installation directory by a rule
that runs rsync.  The previous logic tried to avoid racing with the
rsync rule by depending on the final packaged recovery image, but
if BOARD_MOVE_RECOVERY_RESOURCES_TO_VENDOR_BOOT is set then
INSTALLED_RECOVERYIMAGE_TARGET is left empty and no dependency was
added.  Depend on the timestamp file used as the output of the rule
that runs rsync instead.

Test: query dependencies of installed-files-recovery.txt
Fixes: 173772240
Change-Id: I5ec77a6933e3a83fe4e4819e0e246017d824d8a5
diff --git a/core/Makefile b/core/Makefile
index 2700da8..c9bcb3c 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -1666,16 +1666,15 @@
 INSTALLED_FILES_FILE_RECOVERY := $(PRODUCT_OUT)/installed-files-recovery.txt
 INSTALLED_FILES_JSON_RECOVERY := $(INSTALLED_FILES_FILE_RECOVERY:.txt=.json)
 
+ifeq ($(BOARD_USES_RECOVERY_AS_BOOT),true)
+INSTALLED_BOOTIMAGE_TARGET := $(BUILT_BOOTIMAGE_TARGET)
+endif
+
 # TODO(b/30414428): Can't depend on INTERNAL_RECOVERYIMAGE_FILES alone like other
 # INSTALLED_FILES_FILE_* rules. Because currently there're cp/rsync/rm commands in
 # build-recoveryimage-target, which would touch the files under TARGET_RECOVERY_OUT and race with
 # the call to FILELIST.
-ifeq ($(BOARD_USES_RECOVERY_AS_BOOT),true)
-INSTALLED_BOOTIMAGE_TARGET := $(BUILT_BOOTIMAGE_TARGET)
-$(INSTALLED_FILES_FILE_RECOVERY): $(INSTALLED_BOOTIMAGE_TARGET)
-else
-$(INSTALLED_FILES_FILE_RECOVERY): $(INSTALLED_RECOVERYIMAGE_TARGET)
-endif
+$(INSTALLED_FILES_FILE_RECOVERY): $(INTERNAL_RECOVERY_RAMDISK_FILES_TIMESTAMP)
 
 $(INSTALLED_FILES_FILE_RECOVERY): .KATI_IMPLICIT_OUTPUTS := $(INSTALLED_FILES_JSON_RECOVERY)
 $(INSTALLED_FILES_FILE_RECOVERY): $(INTERNAL_RECOVERYIMAGE_FILES) $(FILESLIST) $(FILESLIST_UTIL)