uclient: update to Git version 2020-12-10

uclient: update to Git version 2020-12-10

2c843b2bc04c Add initial GitLab CI support
073f89f567c0 uclient-fetch: wolfSSL: fix certificate validation
086c292160ac uclient-fetch: init_ca_cert: fix memory leak
a3c1a88b031a cmake: enable extra compiler checks
32ff717ed316 uclient-http: fix extra compiler warnings on mips_24kc and cortex-a9+neon
86a2ac6ac46f uclient-fetch: fix potential memory leaks
158dd9dd289c uclient: fix initialized but never read variable
66b4420856a7 uclient-fetch: fix statement may fallt hrough
436f9b3af2ad uclient-http: fix freeing of stack allocated memory
e6b5b8a98ce2 Fix extra compiler warnings
12df67e45bb0 Add basic cram based unit tests
b6e34845124f cmake: fix building out of the tree

Signed-off-by: Petr Štetiar <ynezz@true.cz>