[mob, mingw] spawnp warning fix
[mob, mingw] spawnp warning fix

    Author: Christian Jullien
    Date:   Mon May 16 17:58:56 2016 +0200

    Microsoft says that _spawnp must be used instead of spawnp. It fixes
    a warning when compiled with MinGW 32/64 gcc compilers

seyko2/tinycc,seyko2/tinycc,seyko2/tinycc,seyko2/tinycc,seyko2/tinycc