ARM64: take a look at todo in sos code

[BruceForstall]

Issue copied from https://github.com/dotnet/coreclr/issues/6580

The following @ARM64TODO in debug/SOS code (using dotnet/coreclr paths):

ToolBox\SOS\Strike\disasmARM64.cpp:    // ARM64TODO: needs to be implemented for jump stubs for ngen case
ToolBox\SOS\Strike\disasmARM64.cpp:    // ARM64TODO: not (yet) implemented. perhaps we don't need it at all.
ToolBox\SOS\Strike\disasmARM64.cpp:            // ARM64TODO: we could possibly handle adr(p)/ldr pair too.

[cshung]

Thanks @BruceForstall for this information.

Here is where the jump stub for ARM64 are generated, the disassembler need to work with this.

https://github.com/dotnet/coreclr/blob/c5935b38947fe1c6beea1a9191e58b3048355b67/src/vm/arm64/cgencpu.h#L264