[molecules/arm-base] fixup remaster_post code, don't mess with /proc

scripts/mmc_remaster_post.sh

@@ -0,0 +1,13 @@
+#!/bin/sh
+PKGS_DIR="/sabayon/pkgcache"
+CHROOT_PKGS_DIR="${CHROOT_DIR}/var/lib/entropy/client/packages"
+
+# remove entropy hwash
+rm -f "${CHROOT_DIR}"/etc/entropy/.hw.hash
+# remove entropy pid file
+rm -f "${CHROOT_DIR}"/var/run/entropy/entropy.lock
+
+echo "Umounting bind to ${CHROOT_PKGS_DIR}"
+umount "${CHROOT_PKGS_DIR}" || exit 1
+
+exit 0