Rename vendor-ramdisk to vendor_ramdisk

Rename to get consistent ramdisk directory naming in
out/target/product/<name>:
  debug_ramdisk
  ramdisk
  vendor_debug_ramdisk
  vendor_ramdisk

Test: build and inspect out/target/product/<name>
Change-Id: I81d8f2cafe5e1b9024196cd74772b78d4a4aec58
diff --git a/CleanSpec.mk b/CleanSpec.mk
index 41defb2..3beadff 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -754,6 +754,8 @@
 # Workaround for Soong not being able to rebuild the host binary if its
 # JNI dependencies change: b/170389375
 $(call add-clean-step, rm -rf $(OUT_DIR)/soong/host/*/lib*/libconscrypt_openjdk_jni.so)
+# vendor-ramdisk renamed to vendor_ramdisk
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/vendor-ramdisk)
 
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST