fix: Add newline before closing GCC pragma in SatDump lua_utils patch

If lua_utils.cpp has no trailing newline the closing pragma was appended
directly to the last line (};#pragma GCC diagnostic pop), causing a
stray '#' compile error on GCC 13+ / Raspberry Pi OS Bookworm.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

setup.sh

@@ -799,6 +799,7 @@ install_satdump_from_source_debian() {
         echo '#pragma GCC diagnostic ignored "-Wdeprecated"'
         echo '#pragma GCC diagnostic ignored "-Wdeprecated-declarations"'
         cat "$lua_utils"
+        echo  # ensure the file ends with a newline before the closing pragma
         echo '#pragma GCC diagnostic pop'
       } > "${lua_utils}.patched" && mv "${lua_utils}.patched" "$lua_utils"
     fi