convert line endings from CRLF (Windows) to LF (Linux/Unix)

Mixed line endings cause problems when exporting patches with
git-format-patch and then trying to "git am" a patch with mixed and
non-matching line endings. In such a situation git will fail to apply
the patch.

This commit runs the dos2unix tools on the remaining files with CRLF
(\r\n) line endings to convert them to line-feeds (\n) only.

Files that are Windows specific like *.vcxproj and *.props files were
not converted.

Closes: #3073

test/StdInc.cpp

@@ -1,12 +1,12 @@
-/*
- * StdInc.cpp, part of VCMI engine
- *
- * Authors: listed in file AUTHORS in main folder
- *
- * License: GNU General Public License v2.0 or later
- * Full text of license available in license.txt file, in main folder
- *
- */
-// Creates the precompiled header
-#include "StdInc.h"
-
+/*
+ * StdInc.cpp, part of VCMI engine
+ *
+ * Authors: listed in file AUTHORS in main folder
+ *
+ * License: GNU General Public License v2.0 or later
+ * Full text of license available in license.txt file, in main folder
+ *
+ */
+// Creates the precompiled header
+#include "StdInc.h"
+

test/StdInc.h

@@ -1,13 +1,13 @@
-/*
- * StdInc.h, part of VCMI engine
- *
- * Authors: listed in file AUTHORS in main folder
- *
- * License: GNU General Public License v2.0 or later
- * Full text of license available in license.txt file, in main folder
- *
- */
-#pragma once
-#include "gtest/gtest.h"
-#include "gmock/gmock.h"
-#include "../Global.h"
+/*
+ * StdInc.h, part of VCMI engine
+ *
+ * Authors: listed in file AUTHORS in main folder
+ *
+ * License: GNU General Public License v2.0 or later
+ * Full text of license available in license.txt file, in main folder
+ *
+ */
+#pragma once
+#include "gtest/gtest.h"
+#include "gmock/gmock.h"
+#include "../Global.h"