[PUYA] Prepare for upcoming PUYA patch in core library

See https://github.com/esp8266/Arduino/pull/5504
This needs a little change in the detect script to see if the previous patch already was applied.

patches/check_puya_patch

@@ -5,7 +5,7 @@ PATCH=puya_v3.patch
 for DIR in ~/.platformio/packages/framework-arduinoespressif8266*/; do
 
   #not applied yet? (in upstream or otherwise)
-  if ! grep "0x146085 PUYA" $DIR/cores/esp8266/Esp.cpp >/dev/null; then
+  if ! grep "PUYA" $DIR/cores/esp8266/Esp.cpp >/dev/null; then
     echo "Patching $DIR"
     patch -p1 -d $DIR < $PATCH
   fi