Move remount to PRODUCT_PACKAGES_DEBUG.

required seems to conflict with apex with the following error:

    build/make/core/main.mk:1338: warning: build/make/target/product/aosp_x86_64.mk produces files inside build/make/target/product/mainline_system.mks artifact path requirement.

Test: treehugger
Change-Id: Ifb1072b4585a94355909b33e3b8129455c35714a
diff --git a/target/product/base_system.mk b/target/product/base_system.mk
index f49218a..7cc3270 100644
--- a/target/product/base_system.mk
+++ b/target/product/base_system.mk
@@ -364,6 +364,7 @@
     logpersist.start \
     logtagd.rc \
     procrank \
+    remount \
     showmap \
     sqlite3 \
     ss \