Makefile: re-add -fsanitize=address
Makefile: re-add -fsanitize=address

As it was included in the .gitlab-ci.yml, it should also be part of
UBSAN=1

mrirecon/bart,sidward/bart,sidward/bart,sidward/bart,mrirecon/bart,sidward/bart,mrirecon/bart,mrirecon/bart,mrirecon/bart,sidward/bart