Use python3 to make tryton installer

(grafted from 75b61640df96960c9431522571ef3bfcac46c280)

--HG--
branch : 8.0

tryton/make-darwin-installer.sh

@@ -13,7 +13,7 @@ gtk-query-immodules-3.0 \
     | sed -e '/^#/d' \
     | sed  -e 's@/.*/lib/gtk-3.0@\@executable_path/lib/gtk-3.0@' \
     > darwin/gtk-3.0/gtk.immodules
-python ./hatch_build.py
+python3 ./hatch_build.py
 ./setup-freeze.py bdist_mac
 mkdir dist
 mv build/Tryton.app dist/

tryton/make-win32-installer.sh

@@ -2,12 +2,12 @@
 set -e
 version=`python3 -m build -q --metadata 2>/dev/null | jq -r .version`
 series=${version%.*}
-bits=`python -c "import platform; print(platform.architecture()[0])"`
+bits=`python3 -c "import platform; print(platform.architecture()[0])"`
 rm -rf build dist
 mkdir -p win32/gtk-3.0
 gdk-pixbuf-query-loaders | sed -e '/^#/d' > win32/gtk-3.0/gdk-pixbuf.loaders
 gtk-query-immodules-3.0 | sed -e '/^#/d' > win32/gtk-3.0/gtk.immodules
-python ./hatch_build.py
+python3 ./hatch_build.py
 ./setup-freeze.py install_exe -d dist
 cp `which gdbus.exe` dist/
 makensis -DVERSION=${version} -DSERIES=${series} -DBITS=${bits} setup.nsi