11-STABLE and 12-STABLE build failures

[Don Lewis]

On 25 Jul, Don Lewis wrote:
> On 25 Jul, Don Lewis wrote:
>> On 25 Jul, Warner Losh wrote:
>>> Liby.a was retired. Maybe there is some dangling references?
>> 
>> # grep yydebug *
>> localedef.c:	yydebug = 0;
>> localedef.h:extern int yydebug;
>> 
>> I see the same in the 13-CURRENT source and it builds successfully.
> 
> If I diff the two source trees, I see that the 13-CURRENT references are
> guarded by #if YYDEBUG.

Looks like we need this MFC:

%svn log -c 362569
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r362569 | jkim | 2020-06-23 19:08:08 -0700 (Tue, 23 Jun 2020) | 2 lines

Fix build with recent byacc.

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