suite_aggrs: - added support to gen unions in addition to structs - regenerated struct/union-mixed and nested cases - made rand-sig.lua ignore closing struct/union chars if not opened, effectively reducing number of empty aggregates as it now generated way too much

#!/bin/sh
cd `dirname $0`

../portasm/gen-masm.sh dyncall_call_x86 _generic_masm
../portasm/gen-masm.sh dyncall_call_x64 _generic_masm