Merged a few fixes for non-posix systems from github.com/Siesh1oo/yosys

(see https://github.com/cliffordwolf/yosys/pull/28)

passes/cmds/select.cc

@@ -23,6 +23,7 @@
 #include "kernel/log.h"
 #include <string.h>
 #include <fnmatch.h>
+#include <errno.h>
 
 using RTLIL::id2cstr;