CMakeVersion.rc: Avoid preprocessor definitions to support llvm-rc

`llvm-rc` does not support them as of version 8.

Source/CMakeVersion.rc.in

 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
 
-#define VER_FILEVERSION             @CMake_RCVERSION@
-#define VER_FILEVERSION_STR         "@CMake_RCVERSION_STR@\0"
-
-#define VER_PRODUCTVERSION          @CMake_RCVERSION@
-#define VER_PRODUCTVERSION_STR      "@CMake_RCVERSION_STR@\0"
-
-/* Version-information resource identifier.  */
-#define VS_VERSION_INFO 1
-
-VS_VERSION_INFO VERSIONINFO
-FILEVERSION    	VER_FILEVERSION
-PRODUCTVERSION 	VER_PRODUCTVERSION
+1               VERSIONINFO
+FILEVERSION     @CMake_RCVERSION@
+PRODUCTVERSION  @CMake_RCVERSION@
 BEGIN
     BLOCK "StringFileInfo"
     BEGIN
         BLOCK "040904E4"
         BEGIN
-            VALUE "FileVersion",      VER_FILEVERSION_STR
-            VALUE "ProductVersion",   VER_PRODUCTVERSION_STR
+            VALUE "FileVersion",      "@CMake_RCVERSION_STR@\0"
+            VALUE "ProductVersion",   "@CMake_RCVERSION_STR@\0"
         END
     END