add ReleaseSmall mode in zig tests
add ReleaseSmall mode in zig tests

closes #969

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