[gnome-panel] rename Readme.md to README.md and add it to EXTRA_DIST

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 29cb09e10769c555331545211e628f599a6eb0b3
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sun Jun 16 22:24:28 2019 +0300

    rename Readme.md to README.md and add it to EXTRA_DIST
    
    https://gitlab.gnome.org/GNOME/gnome-panel/issues/14

 Makefile.am            | 1 +
 Readme.md => README.md | 0
 2 files changed, 1 insertion(+)
---
diff --git a/Makefile.am b/Makefile.am
index fd020a081..f30d8388e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -19,6 +19,7 @@ AM_DISTCHECK_CONFIGURE_FLAGS = \
 EXTRA_DIST = \
        COPYING-DOCS \
        HACKING \
+       README.md \
        $(NULL)
 
 MAINTAINERCLEANFILES = \
diff --git a/Readme.md b/README.md
similarity index 100%
rename from Readme.md
rename to README.md