New comment by sgn on void-packages repository

https://github.com/void-linux/void-packages/pull/21131#issuecomment-616545010

Comment:
It's caused by missing of `tzdata`,

This diff can fix it.
Please check if this is correct.

```diff
diff --git a/srcpkgs/mu/template b/srcpkgs/mu/template
index 51f733e03c..fa04f9d6d3 100644
--- a/srcpkgs/mu/template
+++ b/srcpkgs/mu/template
@@ -3,8 +3,9 @@ pkgname=mu
 version=1.4.1
 revision=1
 build_style=gnu-configure
-hostmakedepends="automake libtool pkg-config emacs texinfo"
+hostmakedepends="automake libtool pkg-config emacs texinfo glib-devel"
 makedepends="xapian-core-devel gmime3-devel libuuid-devel"
+checkdepends="tzdata"
 short_desc="Emacs-based tool for dealing with e-mail stored in the Maildir-format"
 maintainer="Benjamin Slade <slade@jnanam.net>"
 license="GPL-3.0-or-later"
```