debian/apt-utils.symbols: fix symbol instead of removing it

debian/apt-utils.symbols

@@ -110,6 +110,8 @@ libapt-inst.so.1.2 libapt-inst1.2
  (c++|optional)"vtable for pkgCache::Iterator<pkgCache::Dependency, pkgCache::DepIterator>@Base" 0.8.0
  (c++|optional)"vtable for pkgCache::Iterator<pkgCache::Package, pkgCache::PkgIterator>@Base" 0.8.0
  (c++|optional)"vtable for pkgCache::Iterator<pkgCache::Version, pkgCache::VerIterator>@Base" 0.8.0
+### gcc-4.4 specific
+ (c++|optional=std)"std::basic_string<char, std::char_traits<char>, std::allocator<char> >& std::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_replace_dispatch<unsigned char*>(__gnu_cxx::__normal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, __gnu_cxx::__normal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, unsigned char*, unsigned char*, std::__false_type)@Base" 0.8.0
 ### try to ignore std:: template instances
  (c++|optional=std)"std::basic_string<char, std::char_traits<char>, std::allocator<char> >& std::basic_string<char, std::char_traits<char>, std::allocator<char> >::append<unsigned char*>(unsigned char*, unsigned char*)@Base" 0.8.0
  (c++|regex|optional=std)"^std::basic_string<.+ >\(.+\)@Base$" 0.8.0