ci(gcb): set LD_LIBRARY_PATH when running quickstart (#6280)

Fixes: #6278

This is needed to find the shared libraries that the Makefile
quickstarts will need to link with.

Author: devjgm

ci/cloudbuild/builds/lib/quickstart.sh

@@ -61,6 +61,8 @@ function quickstart::run_cmake_and_make() {
     io::log "[ Make ]"
     PKG_CONFIG_PATH="${prefix}/lib64/pkgconfig:${prefix}/lib/pkgconfig:${PKG_CONFIG_PATH:-}" \
       make -C "${src_dir}"
-    test "${#run_args[@]}" -eq 0 || "${src_dir}/quickstart" "${run_args[@]}"
+    test "${#run_args[@]}" -eq 0 ||
+      LD_LIBRARY_PATH="${prefix}/lib64:${prefix}/lib:${LD_LIBRARY_PATH:-}" \
+        "${src_dir}/quickstart" "${run_args[@]}"
   done
 }