llext: test upstream Zephyr PR code

This is a test PR to test updates to the LLEXT feature in Zephyr.

Signed-off-by: Luca Burelli <l.burelli@arduino.cc>

Author: pillo79

west.yml

@@ -43,7 +43,7 @@ manifest:
 
     - name: zephyr
       repo-path: zephyr
-      revision: 689d1edee1d57f052b1d4572d67618c0b0e2b8a4
+      revision: pull/78265/head
       remote: zephyrproject
 
       # Import some projects listed in zephyr/west.yml@revision