Update pathscale compiler detection

Originally committed as revision 25122 to svn://svn.ffmpeg.org/ffmpeg/trunk

configure

@@ -1967,7 +1967,7 @@ elif $cc -V 2>&1 | grep -q Sun; then
             esac
         done
     }
-elif $cc -v 2>&1 | grep -q PathScale; then
+elif $cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
     cc_type=pathscale
     cc_version=__PATHSCALE__
     cc_ident=$($cc -v 2>&1 | head -n1 | tr -d :)