[ur] Fix adapters linker script path on Linux

[kbenzie]

Use an absolute path instead of just the filename for the
ur_adapter_<name>.map files to resolve /usr/bin/ld: cannot open linker script file errors.

[pbalcer]

That's odd, it works on my system and in CI.

[kbenzie]

That's odd, it works on my system and in CI.

I use ninja instead of make so wondered if it was that but I also see this when using make so it must be something else but I'm drawing a blank.

[pbalcer]

That's odd, it works on my system and in CI.

I use ninja instead of make so wondered if it was that but I also see this when using make so it must be something else but I'm drawing a blank.

I don't think this change will break anything, so no point in wasting time. Lgtm.