xfce4-diskperf-plugin: update to 2.6.3
2.6.3 (2020/12/21):
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- Fix build with panel 4.15+
- Fix missing-prototypes
- Remove GSourceFunc casts
- Add basic GitLab pipeline
- Update URLs from goodies.x.o to docs.x.o (Bug #16160)
- Update .gitignore
- Make build less verbose
- Translation Updates:
Albanian, Arabic, Armenian (Armenia), Belarusian, Chinese (Taiwan),
Croatian, Eastern Armenian, English (Canada), English (United
Kingdom), Galician, Greek, Hebrew, Indonesian, Korean, Latvian,
Occitan (post 1500), Panjabi (Punjabi), Polish, Portuguese (Brazil),
Slovak, Slovenian, Spanish, Swedish, Turkish, Urdu, Urdu (Pakistan),
Uyghur
ae0bfba448