Pack base_fs files into target_files.zip.

Pack the base_fs files ({system,vendor}.map) into target_files.zip,
which would be needed when rebuilding the images at signing.

Reset the base_fs paths to point to the files in META/.

Also add blk_alloc_to_base_fs into otatools.zip.

Bug: 27698960
Change-Id: If4eb274b3f3d839c4365624f46f0dc89bd2fa440
diff --git a/core/Makefile b/core/Makefile
index ccd17e3..f377051 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -1501,7 +1501,8 @@
   $(HOST_OUT_EXECUTABLES)/fec \
   $(HOST_OUT_EXECUTABLES)/brillo_update_payload \
   $(HOST_OUT_EXECUTABLES)/lib/shflags/shflags \
-  $(HOST_OUT_EXECUTABLES)/delta_generator
+  $(HOST_OUT_EXECUTABLES)/delta_generator \
+  $(BLK_ALLOC_TO_BASE_FS)
 
 # Shared libraries.
 OTATOOLS += \
@@ -1754,6 +1755,14 @@
 	# OTA scripts are only interested in fingerprint related properties
 	$(hide) echo "oem_fingerprint_properties=$(OEM_THUMBPRINT_PROPERTIES)" >> $(zip_root)/META/misc_info.txt
 endif
+ifneq ($(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SYSTEM_BASE_FS_PATH),)
+	$(hide) $(ACP) $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SYSTEM_BASE_FS_PATH) \
+	  $(zip_root)/META/$(notdir $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SYSTEM_BASE_FS_PATH))
+endif
+ifneq ($(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VENDOR_BASE_FS_PATH),)
+	$(hide) $(ACP) $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VENDOR_BASE_FS_PATH) \
+	  $(zip_root)/META/$(notdir $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VENDOR_BASE_FS_PATH))
+endif
 ifneq ($(strip $(SANITIZE_TARGET)),)
 	# We need to create userdata.img with real data because the instrumented libraries are in userdata.img.
 	$(hide) echo "userdata_img_with_data=true" >> $(zip_root)/META/misc_info.txt