CI: add dtb location check (MR 3254)

[ci:ignore-count]: Too many packages probably
[ci:skip-build]: No way this would finish in time

.ci/check-dtb-install-location.sh

@@ -0,0 +1,7 @@
+#!/bin/sh -e
+
+if grep -r 'INSTALL_DTBS_PATH="$pkgdir"/usr/share/dtb'; then
+	echo 'Please do not install dtbs to /usr/share/dtb!'
+	echo 'Unless you have a good reason not to, please put them in /boot/dtbs'
+	exit 1
+fi

.gitlab-ci.yml

@@ -71,6 +71,7 @@ aports-static:
   script:
     - su pmos -c ".ci/run_testcases.sh"
     - su pmos -c ".ci/check_changed_aports_versions.py"
+    - su pmos -c ".ci/check-dtb-install-location.sh"
   artifacts:
     when: on_failure
     paths: