[chronojump] Minor change on howto_compile instructions

[Xavier de Blas <xaviblas src gnome org>]

commit 8c96f90794f0a3122e3847a131c48141fec993d1
Author: Xavier de Blas <xaviblas gmail com>
Date:   Tue Jun 29 17:06:39 2021 +0200

    Minor change on howto_compile instructions

 howto_compile.txt | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/howto_compile.txt b/howto_compile.txt
index 7549d0622..fd4f6ecfe 100644
--- a/howto_compile.txt
+++ b/howto_compile.txt
@@ -28,6 +28,8 @@ git pull
 cd package/macos
 make
 
+if date is not ok in the virtual system, is better to reboot
+
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