preproc.i: Shorten classname for scilab

Errors were:

../../../../../../Examples/test-suite/scilab/../preproc.i:400: Error: Wrapping functions names for member 'tcxMessageTestSlashSlash.mHeader' will exceed 24 characters, please rename the container of member 'tcxMessageTestSlashSlash'.
../../../../../../Examples/test-suite/scilab/../preproc.i:408: Error: Wrapping functions names for member 'tcxMessageBugSlashSlash.mBid' will exceed 24 characters, please rename the container of member 'tcxMessageBugSlashSlash'.
diff --git a/Examples/test-suite/preproc.i b/Examples/test-suite/preproc.i
index 6d6549b..f666911 100644
--- a/Examples/test-suite/preproc.i
+++ b/Examples/test-suite/preproc.i
@@ -391,16 +391,16 @@
 }) tcxMessageBug;
 
 
-TCX_PACKED (typedef struct tcxMessageTestImplSlashSlash
+TCX_PACKED (typedef struct tcxMessageTestImpl2
 {
     int mHeader; ///< comment
-}) tcxMessageTestSlashSlash;
+}) tcxMessageTest2;
 
 
-TCX_PACKED (typedef struct tcxMessageBugImplSlashSlash
+TCX_PACKED (typedef struct tcxMessageBugImpl2
 {
     int mBid; ///< Bid price and size, check PresentMap if available in message
-}) tcxMessageBugSlashSlash;
+}) tcxMessageBug2;
 
 
 %}