Here we have the patch for gold aarch64 backend to support relaxation.

Here we have the patch for gold aarch64 backend to support relaxation.

In short relaxation is the linker's generation of stubs that fixes the
out-of-range jumps/branches in the original object file.

With this implementation, we are able to link a 456MB aarch64 application.

Tested:
1) Build natively on x86_64 and aarch64 machines.
2) Pass unit tests regarding relaxation.