obs/fluent-bit: Set proper version.

Set a proper version.
Upgrade to buildout 2.7.1+slapos019

obs/fluent-bit/env.sh

 # package containing fluent-bit
 
-export SOFTWARE_NAME=fluent-bit
 export MAINTAINER_NAME="Ophélie Gagnard"
 export MAINTAINER_EMAIL=ophelie.gagnard@nexedi.com
+
+export SOFTWARE_NAME=fluent-bit
+# version format: <fluent-bit>+<slapos>
+export SOFTWARE_VERSION=1.9.7+1.0.277
+export GIT_BRANCH_OR_COMMIT=1.0.277
+
 export PACKAGE_BUILD_DEPENDENCIES="debhelper, chrpath, python3 (>=3.7) | python, python3-dev (>= 3.7) | python-dev"
 export SETUPTOOLS_VERSION=44.1.1
 export ZC_BUILDOUT_VERSION=2.7.1+slapos019