tweak swig script for mod_managed

src/mod/languages/mod_managed/runswig.2010.cmd

+move freeswitch_wrap.cxx freeswitch_wrap.bak
+\dev\swig20\swig.exe -I..\..\..\include -v -O -c++ -csharp -namespace FreeSWITCH.Native -dllimport mod_managed -DSWIG_CSHARP_NO_STRING_HELPER freeswitch.i 
+del swig.csx
+move freeswitch_wrap.cxx freeswitch_wrap.2010.cxx
+move freeswitch_wrap.bak freeswitch_wrap.cxx
+@ECHO OFF
+for %%X in (*.cs) do type %%X >> swig.csx
+@ECHO ON
+move swig.csx managed\swig.2010.cs
+del *.cs

src/mod/languages/mod_managed/runswig.cmd

-\dev\swig\swig.exe -I..\..\..\include -v -O -c++ -csharp -namespace FreeSWITCH.Native -dllimport mod_managed -DSWIG_CSHARP_NO_STRING_HELPER freeswitch.i 
+\dev\swig135\swig.exe -I..\..\..\include -v -O -c++ -csharp -namespace FreeSWITCH.Native -dllimport mod_managed -DSWIG_CSHARP_NO_STRING_HELPER freeswitch.i 
 del swig.csx
 @ECHO OFF
 for %%X in (*.cs) do type %%X >> swig.csx