Hi,

Using Guile-2.0 and Guile-2.2 together is currently cumbersome, esp. on
Guix, mainly because of incompatible .go files that must not be in the
GUILE_LOAD_COMPILED_PATH.

This patch allows using compiled .go files for guile and guile-next in
one GUILE_LOAD_COMPILED_PATH by having guile skip any invalid .go files
and thus allows for incremental upgrade to guile-2.2.

Greetings, Jan