make prepareModules-linux.sh script work without the aqt wrapper binary

Depending on the distribution, the aqt binary is not installed or the
path is not set correctly. Calling the python interpreter instead always
works.

sources/jvxLibraries/third_party/web/qt/prepareModules-linux.sh

@@ -6,5 +6,5 @@
 # aqt list-qt linux desktop --arch 5.15.2
 if [ ! -d "qt/$1/$2" ]; then
 	echo aqt install-qt linux desktop $1 $2 -O qt
-	aqt install-qt linux desktop $1 $2 -O qt
+	python3 -m aqt install-qt linux desktop $1 $2 -O qt
 fi