6.5-stable backport request

Hello,

Please queue up this commit for 6.5-stable:

* commit: 88cc47e24597971b05b6e94c28a2fc81d2a8d61a ("perf build: Define YYNOMEM as YYNOABORT for bison < 3.81") * Author: Arnaldo Carvalho de Melo acme@redhat.com

The recent change v6.5 series added YYNOMEM changes in the perf tool and it caused a build failure on machines with older bison. The above commit should be applied to fix it.

Thanks, Namhyung