This further uses symbol ptrs across jitlink, i think in most places now we use it for the symbol name, there is some clean up to go, but this is a good starting point

Removing a isNamed in favour of just using the comparisons

Removing an uncessary if statement

Review comments addressed and also just went and removed the getName returning a stringref.

Using write64le instead of a cast. Thanks @MaskRay
and fixing up a style issue

This includes support for section relative relocations as well as responding to the clang-tidy issues

Adding the relocation test file (thanks lang!)

This should fix up the review comments, and the clang-tidy issue
Will add the tests later tonight

Clang-format was run but doesn't seem to catch this case, ill clean it up later this afternoon.

I will try and get commit status but I think to get this into tree, lets just have you commit it for now.