Half-disable pthread for ps3toolchain.

I can't find anything for pthread other that pthread.h, but this lets nq
and qw stuff build (minus the pending networking issues).

config.d/pthread.m4

@@ -1,8 +1,11 @@
 if test "x$ac_cv_header_pthread_h" = "xyes"; then
 	save_LIBS="$LIBS"
-	case "$host_os" in
+	echo $host_vendor-$host_os
+	case "$host_vendor-$host_os" in
 		*android*)  dnl android has all pthread* functions in the libc.
 			;;
+		*ps3*)  dnl qnx has all pthread* functions in the libc.
+			;;
 		*qnx*)  dnl qnx has all pthread* functions in the libc.
 			;;
 		*openbsd*)