Added a new command line options to sanitycheck:
--enable-coverage which will compile for native_posix
with CONFIG_COVERAGE set, and unit tests accordingly.
+
Now -C --coverage implies also --enable-coverage.
Background:
After 608778a4de
it is possible to add Kconfig options from command
line during the cmake invocation.
So we can use it to set CONFIG_COVERAGE for the native_posix
target when we need to instead of relaying on it always
being compiled with coverage enabled.
Signed-off-by: Alberto Escolar Piedras <alpi@oticon.com>