Add <partition>/radio support to fsgen

Test: m on qualcomm device with
  PRODUCT_COPY_FILES += \
    qcril.db:$(TARGET_COPY_OUT_VENDOR)/radio/qcril_database/qcril.db
Change-Id: I2fa887eef21a8d554f27add6b63da31b53931003
diff --git a/android/neverallow.go b/android/neverallow.go
index 8995a0f..8a3129f 100644
--- a/android/neverallow.go
+++ b/android/neverallow.go
@@ -378,6 +378,7 @@
 			"prebuilt_sbin",
 			"prebuilt_system",
 			"prebuilt_first_stage_ramdisk",
+			"prebuilt_radio",
 		).
 		DefinedInBpFile().
 		Because("module type not allowed to be defined in bp file")