Bump to 2.0.3-dev

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Support mingw PIC build with DOLT

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
dolt: support nacl and silent-rules on fallback

nacl doesn't use pic as does mingw.

Signed-off-by: Rafaël Carré <funman@videolan.org>
m4: enable dolt support for further apple platforms

This allows us to use it on x86_64, ppc and iOS, too.
NEWS: update

Signed-off-by: Timothy Gu <timothygu99@gmail.com>