[QPG] Fix for OpenThread Stack bump compile issue

Author: dvdm-qorvo

third_party/openthread/platforms/qpg/BUILD.gn

@@ -50,6 +50,10 @@ source_set("openthread_mbedtls_config_qpg") {
 }
 
 source_set("libopenthread-qpg") {
+  include_dirs = [
+    "${openthread_qpg_root}/src/${openthread_qpg_family}",
+    "${openthread_root}/examples/platforms/utils",
+  ]
   sources = [
     "${openthread_qpg_root}/src/${openthread_qpg_family}/alarm.c",
     "${openthread_qpg_root}/src/${openthread_qpg_family}/diag.c",