update scons qt tool (#27825)

* update scons qt tool

* support old and new

---------

Co-authored-by: Comma Device <device@comma.ai>

SConstruct

@@ -5,6 +5,8 @@ import sysconfig
 import platform
 import numpy as np
 
+import SCons.Errors
+
 TICI = os.path.isfile('/TICI')
 AGNOS = TICI
 
@@ -311,7 +313,11 @@ else:
   elif arch != "Darwin":
     qt_libs += ["GL"]
 
-qt_env.Tool('qt')
+try:
+  qt_env.Tool('qt3')
+except SCons.Errors.UserError:
+  qt_env.Tool('qt')
+
 qt_env['CPPPATH'] += qt_dirs + ["#selfdrive/ui/qt/"]
 qt_flags = [
   "-D_REENTRANT",