add javac version to jar name

Author: drm

build.sh

@@ -3,8 +3,7 @@
 set -x
 set -e
 
-rm -rf ./bin/
-mkdir bin;
+mkdir -p bin;
 
 javac $(find src -name "*.java") $(find test -name "*.java") -d bin
-cd bin && jar -cvf ./java-redis-client-$(git describe).jar $(find . -name "*.class")
+cd bin && jar -cvf ./java-redis-client-$(git describe)--$(javac -version 2>&1 | sed 's/[^a-z0-9._]\+/-/g').jar $(find . -name "*.class")