* common.din: Export posix_spawn[...] functions.

* exec.cc (execve): Add EXPORT_ALIAS _execve.
	* include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
	* posix.sgml (std-susv4):  Add posix_spawn[...] here.
	(std-notimpl): Drop here.

winsup/cygwin/exec.cc

@@ -93,6 +93,7 @@ execve (const char *path, char *const argv[], char *const envp[])
   MALLOC_CHECK;
   return spawnve (_P_OVERLAY, path, argv, envp);
 }
+EXPORT_ALIAS (execve, _execve)	/* For newlib */
 
 extern "C" int
 execvp (const char *file, char * const *argv)