Integer type sizes incorrectly handled on Linux

[BeanCheeseBurrito]

Some platforms define 8-byte types like uint64_t as unsigned long int and causes CppAst to return CppPrimitiveType objects with the wrong byte size. A possible fix would be something like:

// Old
case CXTypeKind.CXType_ULong:
    return CppPrimitiveType.UnsignedInt;

// New
case CXTypeKind.CXType_ULong:
    return type.SizeOf == 8 ? CppPrimitiveType.UnsignedLongLong : CppPrimitiveType.UnsignedInt;

CppAst.NET/src/CppAst/CppModelBuilder.cs

Lines 1747 to 1770 in d0d3a1f

	private CppType GetCppTypeInternal(CXCursor cursor, CXType type, CXCursor parent, void* data)
	{
	switch (type.kind)
	{
	case CXTypeKind.CXType_Void:
	return CppPrimitiveType.Void;
	case CXTypeKind.CXType_Bool:
	return CppPrimitiveType.Bool;
	case CXTypeKind.CXType_UChar:
	return CppPrimitiveType.UnsignedChar;
	case CXTypeKind.CXType_UShort:
	return CppPrimitiveType.UnsignedShort;
	case CXTypeKind.CXType_UInt:
	return CppPrimitiveType.UnsignedInt;
	case CXTypeKind.CXType_ULong:
	return CppPrimitiveType.UnsignedInt;
	case CXTypeKind.CXType_ULongLong:
	return CppPrimitiveType.UnsignedLongLong;