gperf: point URL to mirror site
gperf download fails intermittently.
Changing to mirror site will hopefully increase download reliability.
Fixes:
@@ -209,7 +209,7 @@ externals:
gperf:
description: "GNU gperf is a perfect hash function generator"
- url: "https://ftp.gnu.org/gnu/gperf"
+ url: "https://ftpmirror.gnu.org/gnu/gperf"
version: "3.1"
kubernetes:
