meson: Generalise libflashrom product to link as static or dyn

Allow the user to specify if they would like a static archive or a DSO
produced for libflashrom by way of the flag e.g. `-Ddefault_library=static`.

Signed-off-by: Daniel Campello <campello@chromium.org>
Change-Id: I77e5c298163979a0222270b3ac5d03542e5618f7
Reviewed-on: https://review.coreboot.org/c/flashrom/+/51616
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
1 file changed