Include soong_zip in OTA tools package.

Including soong_zip in the OTA tools package enables its use in target files
repackaging scripts.

Bug: 124468071
Test: Generate build, verify that soong_zip exists in otatools.zip at bin/soong_zip
Change-Id: Iee0d9dba73a66de4d1aa6970dd8fb8debb723660
diff --git a/core/Makefile b/core/Makefile
index 1846a88..7eefd13 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -3497,6 +3497,7 @@
 	$(hide) rm -rf $@ $(zip_root)
 	$(hide) mkdir -p $(dir $@) $(zip_root)/bin $(zip_root)/framework $(zip_root)/releasetools
 	$(call copy-files-with-structure,$(OTATOOLS),$(HOST_OUT)/,$(zip_root))
+	$(hide) cp $(SOONG_ZIP) $(zip_root)/bin/
 	$(hide) cp -r -d -p build/make/tools/releasetools/* $(zip_root)/releasetools
 	$(hide) rm -rf $@ $(zip_root)/releasetools/*.pyc
 	$(hide) $(SOONG_ZIP) -o $@ -C $(zip_root) -D $(zip_root) \