releasetools: Store and use the dt image file through target files

Target files packages may be used for signing images separate from the
build process. Store the device tree image file in the target files
package so it can be used during the signing process.

Change-Id: Ie8507121fa9c4ba57ecffeab05bd859ae5f5b788

Author: Brint E. Kriebel

core/Makefile

@@ -1488,7 +1488,7 @@ ifdef BOARD_RAMDISK_OFFSET
 	$(hide) echo "$(BOARD_RAMDISK_OFFSET)" > $(zip_root)/RECOVERY/ramdisk_offset
 endif
 ifeq ($(strip $(BOARD_KERNEL_SEPARATED_DT)),true)
-	$(hide) echo "$(INSTALLED_DTIMAGE_TARGET)" > $(zip_root)/RECOVERY/dt_args
+	$(hide) $(ACP) $(INSTALLED_DTIMAGE_TARGET) $(zip_root)/RECOVERY/dt
 endif
 	@# Components of the boot image
 	$(hide) mkdir -p $(zip_root)/BOOT
@@ -1522,7 +1522,7 @@ ifdef BOARD_RAMDISK_OFFSET
 endif
 
 ifeq ($(strip $(BOARD_KERNEL_SEPARATED_DT)),true)
-	$(hide) echo "$(INSTALLED_DTIMAGE_TARGET)" > $(zip_root)/BOOT/dt_args
+	$(hide) $(ACP) $(INSTALLED_DTIMAGE_TARGET) $(zip_root)/BOOT/dt
 endif
 ifdef ZIP_SAVE_UBOOTIMG_ARGS
 	$(hide) echo "$(ZIP_SAVE_UBOOTIMG_ARGS)" > $(zip_root)/BOOT/ubootargs

tools/releasetools/common.py

@@ -355,10 +355,10 @@ def BuildBootableImage(sourcedir, fs_config_file, info_dict=None):
       cmd.append("--ramdisk_offset")
       cmd.append(open(fn).read().rstrip("\n"))
 
-    fn = os.path.join(sourcedir, "dt_args")
+    fn = os.path.join(sourcedir, "dt")
     if os.access(fn, os.F_OK):
       cmd.append("--dt")
-      cmd.append(open(fn).read().rstrip("\n"))
+      cmd.append(fn)
 
     fn = os.path.join(sourcedir, "pagesize")
     if os.access(fn, os.F_OK):