AppImage: include libOpenGL.so.0 fallback

Currently Ubuntu 25.10 live DVD (ubuntu-25.10-desktop-amd64.iso)
does not include the library, preventing the GUI from being
run.  On the other hand, if used unconditionally, it causes
the warning (even in the U25.10) for which it was removed:
<linuxdeploy/linuxdeploy#152>

So preload the library if is in the system and use the bundled just as
a fallback.

Author: MartinPulec

data/scripts/Linux-AppImage/AppRun

@@ -368,6 +368,7 @@ setup_wayland
 # while portaudio is linked directly to JACK library
 set_ld_preload ultragrid_aplay_portaudio.so libjack
 set_ld_preload ultragrid_vidcap_pipewire.so libpipewire
+set_ld_preload_exe "$AI_LIB_PATH/../bin/uv-qt" libOpenGL.so.0
 
 ## @param $@   <tool> <arguments
 setup_firejail() {

data/scripts/Linux-AppImage/create-appimage.sh

@@ -149,6 +149,10 @@ for n in $EXCLUDE_LIST; do
         if [ "$n" = libjack.so.0 ] || [ "$n" = libpipewire-0.3.so.0 ]; then
                 continue
         fi
+        # not included in U25.10 live
+        if [ "$n" = libOpenGL.so.0 ]; then
+                continue
+        fi
         if [ -f "$APPPREFIX/lib/$n" ]; then
                 rm "$APPPREFIX/lib/$n"
         fi

data/scripts/Linux-AppImage/scripts/preload.sh

@@ -16,14 +16,20 @@ get_loader() {
 #
 set_ld_preload() {
         ug_module_lib=$AI_LIB_PATH/ultragrid/$1
-        if [ ! -f "$ug_module_lib" ]; then
+        set_ld_preload_exe "$ug_module_lib" "$2"
+}
+
+set_ld_preload_exe() {
+        bin=${1?}
+        if [ ! -f "$bin" ]; then
                 return
         fi
         loader=$(get_loader)
         if [ ! -x "$loader" ]; then
                 return
         fi
-        system_lib=$(LD_TRACE_LOADED_OBJECTS=1 $loader "$ug_module_lib" | grep "$2" | grep -v 'not found' | awk '{print $3}')
+        system_lib=$(LD_TRACE_LOADED_OBJECTS=1 $loader "$bin" | grep "$2" |
+                grep -v 'not found' | awk '{print $3}')
         if [ -n "$system_lib" ]; then
                 export LD_PRELOAD="$system_lib"${LD_PRELOAD:+":$LD_PRELOAD"}
         fi