openbsd: crt0.o file is different when build static or dynamic mode
openbsd: crt0.o file is different when build static or dynamic mode

it is a first step for support static *and* dynamic mode for openbsd

raulgrell/zig,zig-lang/zig,andrewrk/zig,raulgrell/zig,raulgrell/zig,zig-lang/zig,raulgrell/zig,raulgrell/zig,andrewrk/zig,zig-lang/zig