build: use linux bindings

Use CppParser C# bindings for linux when compiling on Linux.

Note: this always uses 64 bit version for now.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@iki.fi>

src/CppParser/Bindings/premake4.lua

@@ -30,6 +30,8 @@ project "CppSharp.Parser.CSharp"
       files { "CSharp/i686-pc-win32-msvc/**.cs" }
   elseif os.is_osx() then
       files { "CSharp/i686-apple-darwin12.4.0/**.cs" }
+  elseif os.is_linux() then
+      files { "CSharp/x86_64-linux-gnu/**.cs" }
   else
       print "Unknown architecture"
   end