Ensured symbols for templated functions.

Signed-off-by: Dimitar Dobrev <dpldobrev@protonmail.com>

src/Generator/Passes/GenerateSymbolsPass.cs

@@ -161,7 +161,9 @@ namespace CppSharp.Passes
             var mangled = function.Mangled;
             var method = function as Method;
             return function.IsGenerated && !function.IsDeleted && !function.IsDependent &&
-                !function.IsPure && (!string.IsNullOrEmpty(function.Body) || function.IsImplicit) &&
+                !function.IsPure &&
+                (!string.IsNullOrEmpty(function.Body) || function.IsImplicit ||
+                 function.Namespace is ClassTemplateSpecialization) &&
                 // we don't need symbols for virtual functions anyway
                 (method == null || (!method.IsVirtual && !method.IsSynthetized &&
                  (!method.IsConstructor || !((Class) method.Namespace).IsAbstract))) &&