fix tmpnam to generate better names, not depend on non-ISO-C symbols
fix tmpnam to generate better names, not depend on non-ISO-C symbols

chneukirchen/musl-chris2,chardi/musl,chneukirchen/musl-chris2,chardi/musl,davidlazar/musl,davidlazar/musl,rofl0r/musl-old,chardi/musl,rofl0r/musl-old