glurp: downgrade from 0.11.6 to 0.11.3 as higher releases don't seem to exist

diff --git a/packages/musicpd/glurp_0.11.6.bb b/packages/musicpd/glurp_0.11.3.bb
similarity index 100%
rename from packages/musicpd/glurp_0.11.6.bb
rename to packages/musicpd/glurp_0.11.3.bb