Meta: Actually exclude the Build/ directory from QtCreator refresh

Meta/refresh-serenity-qtcreator.sh

@@ -11,4 +11,4 @@ fi
 
 cd "$SERENITY_ROOT"
 
-find . \( -name Base -o -name Patches -o -name Ports -o -name Root -o -name Toolchain \) -prune -o \( -name '*.ipc' -or -name '*.cpp' -or -name '*.idl' -or -name '*.c' -or -name '*.h' -or -name '*.S' -or -name '*.css' \) -print > serenity.files
+find . \( -name Base -o -name Patches -o -name Ports -o -name Root -o -name Toolchain -o -name Build \) -prune -o \( -name '*.ipc' -or -name '*.cpp' -or -name '*.idl' -or -name '*.c' -or -name '*.h' -or -name '*.S' -or -name '*.css' \) -print > serenity.files