CI: Export few helpful variables for CI tests

Export PKG_NAME and PKG_VERSION to make test scripts better readable
and also export a path to the helper script providing colorful output.

Signed-off-by: Michal Hrusecky <michal.hrusecky@turris.com>

.github/workflows/entrypoint.sh

@@ -4,6 +4,8 @@ mkdir -p /var/lock/
 
 opkg update
 
+[ -n "$CI_HELPER" ] || CI_HELPER="/ci/.github/workflows/ci_helpers.sh"
+
 for PKG in /ci/*.ipk; do
 	tar -xzOf "$PKG" ./control.tar.gz | tar xzf - ./control 
 	# package name including variant
@@ -17,6 +19,8 @@ for PKG in /ci/*.ipk; do
 
 	opkg install "$PKG"
 
+	export PKG_NAME PKG_VERSION CI_HELPER
+
 	TEST_SCRIPT=$(find /ci/ -name "$PKG_SOURCE" -type d)/test.sh
 
 	if [ -f "$TEST_SCRIPT" ]; then