## Description
The resolc long version stopped being populated on the standard JSON and
combined JSON output. This PR restores these fields and populates them.
Separate between compilation and linker phases to allow deploy time
linking and back-porting era compiler changes to fix#91. Unlinked
contract binaries (caused by missing libraries or missing factory
dependencies in turn) are emitted as raw ELF object.
Few drive by fixes:
- #98
- A compiler panic on missing libraries definitions.
- Fixes some incosistent type forwarding in JSON output (empty string
vs. null object).
- Remove the unused fallback for size optimization setting.
- Remove the broken `--lvm-ir` mode.
- CI workflow fixes.
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Signed-off-by: Cyrill Leutwiler <bigcyrill@hotmail.com>
Signed-off-by: xermicus <bigcyrill@hotmail.com>
Signed-off-by: xermicus <cyrill@parity.io>
LJ