git: openjdk/mobile: 8244615: build-performance.m4 is not always parsing /proc/cpuinfo correctly

[duke]

Changeset: 74132fe7
Author:    Magnus Ihse Bursie <ihse at openjdk.org>
Date:      2020-05-07 17:44:21 +0000
URL:       https://git.openjdk.java.net/mobile/commit/74132fe7

8244615: build-performance.m4 is not always parsing /proc/cpuinfo correctly

Reviewed-by: erikj

! make/autoconf/build-performance.m4