This makes it build for me on FreeBSD 11:
1. $(MAKE) has to passed through into update-mocks.
2. FreeBSD sed doesn't turn \n into a newline on RHS.
3. Bash and mako dependencies were missing from INSTALL.md
Fixes: #2850
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
update-mocks was broken, since it assumed the daemon/ directory.
We now use "make" directly to build the test file and harvest errors,
and are more robust if it simply doesn't compile (ie. fails, but no
linker errors).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>