Fix: Linux offsets for libschemasystem.so

[ImBubbles]

Note: This isn't a complete fix for all linux issues, still seems to have issues and seems to only output for modellib before crashing -- hopefully this isn't something specific to linux and something you guys can handle

I still am having the error of Dump: No schemas in libtier0.so but supposedly that's not to do with what I'm doing and I even found where it's happening but I'm so lost when it comes to the exact issue. (This assumption is based on a related bug report)

Fixes

• Obtaining/finding of CreateInterface and children of libschemasystem.so (offset fixes)
• Native linux macro (already fixed from previous PR off of this fork)
• Finally has output in sdk/include/source2sdk/modellib/

Some stuff isn't completely completely fixed, such as no schemas in libtier0.so and GenerateTypeScopeSdk()

Console output (using gdb)

(gdb) run
Starting program: /home/bubbles/CLionProjects/source2gen-linuxpatches/build/Release/bin/source2gen 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
Dump: Loading libclient.so
Dump: Loading libengine2.so
[Detaching after vfork from child process 15653]
Dump: Loading libschemasystem.so
Dump: Loading libtier0.so
Dump: Loading libmatchmaking.so
Dump: Loading libanimationsystem.so
Dump: Loading libhost.so
Dump: Loading libmaterialsystem2.so
Dump: Loading libmeshsystem.so
Dump: Loading libnetworksystem.so
Dump: Loading libpanorama.so
Dump: Loading libparticles.so
Dump: Loading libpulse_system.so
Dump: Loading libresourcesystem.so
Dump: Loading libscenefilecache.so
Dump: Loading libscenesystem.so
Dump: Loading libserver.so
Dump: Loading libsoundsystem.so
Dump: Loading libvphysics2.so
Dump: Loading libworldrenderer.so
Dump: Starting
Dump: No schemas in libtier0.so
GenerateTypeScopeSdk: Assembling module modellib with 22 enum(s) and 113 class(es)

Program received signal SIGSEGV, Segmentation fault.
0x0000555555598b52 in sdk::GenerateTypeScopeSdk(source2_gen::Options const&, sdk::GeneratorCache&, std::basic_string_view<char, std::char_traits<char> >, std::unordered_set<CSchemaEnumInfo const*, std::hash<CSchemaEnumInfo const*>, std::equal_to<CSchemaEnumInfo const*>, std::allocator<CSchemaEnumInfo const*> > const&, std::unordered_set<CSchemaClassInfo const*, std::hash<CSchemaClassInfo const*>, std::equal_to<CSchemaClassInfo const*>, std::allocator<CSchemaClassInfo const*> > const&) ()
(gdb) bt
#0  0x0000555555598b52 in sdk::GenerateTypeScopeSdk(source2_gen::Options const&, sdk::GeneratorCache&, std::basic_string_view<char, std::char_traits<char> >, std::unordered_set<CSchemaEnumInfo const*, std::hash<CSchemaEnumInfo const*>, std::equal_to<CSchemaEnumInfo const*>, std::allocator<CSchemaEnumInfo const*> > const&, std::unordered_set<CSchemaClassInfo const*, std::hash<CSchemaClassInfo const*>, std::equal_to<CSchemaClassInfo const*>, std::allocator<CSchemaClassInfo const*> > const&) ()
#1  0x0000555555589a96 in source2_gen::Dump(source2_gen::Options) ()
#2  0x000055555555e7b2 in main ()

Other discoveries (aka what's still broken)

ImBubbles@8078004#diff-49688d0e9afd4924581d40f13c5d780deba38ff8973e5de5ce28516a40f92fd0

In method GetRequiredNamesForClass - "rn here special" is printed, but not "Null pszName!" nor "im here, but im confused"
Code referenced

            std::cout << "rn here special" << std::endl;
            if(field.m_pszName != nullptr) {
                std::cout << "Null pszName!" << std::endl;
                continue;
            }
            std::cout << "im here, but im confused" << std::endl;