releasetools: img_from_target_files uses zip2zip.

Test: Build the following targets and check the built image archive.
      bonito-userdebug (contains flashable images);
      cf_x86_phone-userdebug (contains super.img);
      aosp_arm64-eng (contains VerifiedBootParams.textproto)
Test: m -j otatools-package; Check that zip2zip is included; Use
      bin/img_from_target_files to generate image archive.
Change-Id: I9f28765bd702849f0df309faebd6aa3072920536
diff --git a/core/config.mk b/core/config.mk
index ca8f523..f521813 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -608,6 +608,7 @@
 ADD_IMG_TO_TARGET_FILES := $(HOST_OUT_EXECUTABLES)/add_img_to_target_files$(HOST_EXECUTABLE_SUFFIX)
 BUILD_IMAGE := $(HOST_OUT_EXECUTABLES)/build_image$(HOST_EXECUTABLE_SUFFIX)
 BUILD_SUPER_IMAGE := $(HOST_OUT_EXECUTABLES)/build_super_image$(HOST_EXECUTABLE_SUFFIX)
+IMG_FROM_TARGET_FILES := $(HOST_OUT_EXECUTABLES)/img_from_target_files$(HOST_EXECUTABLE_SUFFIX)
 MAKE_RECOVERY_PATCH := $(HOST_OUT_EXECUTABLES)/make_recovery_patch$(HOST_EXECUTABLE_SUFFIX)
 OTA_FROM_TARGET_FILES := $(HOST_OUT_EXECUTABLES)/ota_from_target_files$(HOST_EXECUTABLE_SUFFIX)
 SPARSE_IMG := $(HOST_OUT_EXECUTABLES)/sparse_img$(HOST_EXECUTABLE_SUFFIX)