d/changelog: generate entry for 1.9-4 unstable
d/changelog: generate entry for 1.9-4 unstable

Generate changelog entry for liquidprompt 1.9-4 unstable.

Git-Dch: Ignore
Signed-off-by: Arturo Borrero Gonzalez <6536d6b0723dedf12377d931b2edd2f9488a948b@gmail.com>

aborrero/pkg-liquidprompt