[skip ci] Increase tolerance for cve-2014-3538 tests

These regularly fail with "Failed, time=1.5x".

Author: iluuu1994

ext/fileinfo/tests/cve-2014-3538-nojit.phpt

@@ -24,7 +24,7 @@ $t = microtime(true);
 var_dump(finfo_file($fi, $fd));
 $t = microtime(true) - $t;
 finfo_close($fi);
-if ($t < 1.5) {
+if ($t < 2) {
     echo "Ok\n";
 } else {
     printf("Failed, time=%.2f\n", $t);

ext/fileinfo/tests/cve-2014-3538.phpt

@@ -22,7 +22,7 @@ $t = microtime(true);
 var_dump(finfo_file($fi, $fd));
 $t = microtime(true) - $t;
 finfo_close($fi);
-if ($t < 1.5) {
+if ($t < 2) {
     echo "Ok\n";
 } else {
     printf("Failed, time=%.2f\n", $t);