scons: support 2.5.0

scons: support 2.5.0

The get_implicit_deps changed in SCons 2.5, expecting a callable rather
than a path as third argument. Detect the SCons versions and set the
argument appropriately to support both 2.5 and earlier versions.

This closes #95211.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=95211
Signed-off-by: Giuseppe Bilotta <giuseppe.bilotta@gmail.com>
Cc: mesa-stable@lists.freedesktop.org
Acked-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Brian Paul <brianp@vmware.com>