add git tags, prefix-and-ordered by date
+git_tag:
+- 2020-07-08 0.29.21
+- 2020-06-10 0.29.20
+- 2020-05-20 0.29.19
+- 2020-05-19 3.0a5
+- 2020-05-18 0.29.18
+- 2020-05-06 3.0a4
Signed-off-by: NLiu Shaofei <liushaofei5@huawei.com>

Based on "version_control" field for yaml files, add below
three types of git_url:
- github:
  https://github.com/gdraheim/zziplib.git
- git:
  https://git.code.sf.net/p/zsh/code
- gitlab.gnome:
  https://gitlab.gnome.org/GNOME/yelp-tools.gitSigned-off-by: NLiu Shaofei <liushaofei5@huawei.com>

Load/save yaml with script. So as to normalize format/style.

No behavior change. Since future changes will be made by scripts,
this separates the more meaningful changes (like adding git url/tags)
from trivial format changes.

require 'yaml'

ARGV.each do |f|
  h = YAML.load_file f
  File.open(f, 'w') do |fd| fd.write YAML.dump(h) end
end
Signed-off-by: NLiu Shaofei <liushaofei5@huawei.com>
Signed-off-by: NWu Fengguang <wufengguang@huawei.com>