[FrameworkBundle] Add case in Kernel directory guess for PHPUnit

Author: tgalopin

src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php

@@ -79,10 +79,14 @@ private static function getPhpUnitCliConfigArgument()
             if (preg_match('/^-[^ \-]*c$/', $testArg) || $testArg === '--configuration') {
                 $dir = realpath($reversedArgs[$argIndex - 1]);
                 break;
-            } elseif (strpos($testArg, '--configuration=') === 0) {
+            } elseif (0 === strpos($testArg, '--configuration=')) {
                 $argPath = substr($testArg, strlen('--configuration='));
                 $dir = realpath($argPath);
                 break;
+            } elseif (0 === strpos($testArg, '-c')) {
+                $argPath = substr($testArg, strlen('-c'));
+                $dir = realpath($argPath);
+                break;
             }
         }