This patch introduces testing of LLD as library (only for the COFF driver for now). At the moment, we simply run the driver three times in a row, without shutting down LLD. This ensures the cleanup is properly done between each run.
Covering the other drivers works, but some tests need to be improved. An illustrated example is the fix done in the ELF test below. If there's interest in enabling this feature for the other drivers, perhaps respective owners could take a look, and attempt to fix the tests? @sbc100 @int3 @MaskRay The reason is that I'm printing "LLD_IN_TEST (new LLD session)" in stdout, in-between each run, to be able to differentiate the output.