[committed] Drop stabs support from h8300 and v850 ports

[Jeff Law]

On 8/19/2021 12:24 PM, Gerald Pfeifer wrote:
> On Thu, 19 Aug 2021, Jeff Law via Gcc-patches wrote:
>> Whee, two more ports dropping stabs. Committed to the trunk.
> Are you saying you're on a mission to stab wodden stakes into stabs?
Seems that way  :-)    I hadn't really set out to do that, but once rl78 
started failing stabs stuff, I figured I might as well just start the 
process of killing off stabs.  I suspect for the majority of targets 
it's trivial like we've seen for rl78, v8 and h8.

jeff