don't build cabana unless extras (#26072)

don't build cabana on device

this caused CI to fail for xx since qt libs aren't installed in CI docker
old-commit-hash: 41f520c254

SConstruct

@@ -434,6 +434,7 @@ SConscript(['selfdrive/navd/SConscript'])
 if arch in ['x86_64', 'Darwin'] or GetOption('extras'):
   SConscript(['tools/replay/SConscript'])
 
+  if arch in ['x86_64', 'Darwin'] and GetOption('extras'):
     opendbc = abspath([File('opendbc/can/libdbc.so')])
     Export('opendbc')
     SConscript(['tools/cabana/SConscript'])