#1 Please show the exception reason in use-foreign-library

[Bruno]

Dear Developers,

when loading a library with define-foreign-library and use-foreign-library
fails, only an unspecific exception is presented to the user while
sb-alien:load-shared-object shows the exact reason, e.g. the name of a missing
symbol.

Please pass on the exception from sb-alien:load-shared-object or some other
fundamental library function.

Best regards,
Bruno Daniel