* tests/gpgscm/ffi.c (do_get_verbose): New function.
(do_set_verbose): Likewise.
(ffi_init): Turn *verbose* into a function, add *set-verbose!*.
* tests/gpgscm/tests.scm (call): Adapt accordingly.
(call-with-io): Dump output if *verbose* is high.
(pipe-do): Adapt accordingly.
* tests/openpgp/defs.scm: Set verbosity according to environment.
* tests/openpgp/run-tests.scm (test): Adapt accordingly.