add ChangeLog, polish code

ChangeLog

@@ -1,3 +1,8 @@
+2019-06-21 Alibaba Cloud.
+	* VERSION: 1.6.8
+	* IMPROVE: add hypervisor.
+	* IMPROVE: add key filter in `rump` mode.
+	* IMPROVE: add prometheus metrics with url: "localhost:$http_profile/metrics"
 2019-06-13 Alibaba Cloud.
 	* VERSION: 1.6.7
 	* IMPROVE: split big key in `rump` mode.

build.sh

@@ -13,6 +13,9 @@ else
 fi
 branch=$branch","$cid
 
+output=./bin/
+rm -rf ${output}
+
 # make sure we're in the directory where the script lives
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 cd "$SCRIPT_DIR"
@@ -36,9 +39,13 @@ info=$info","$t
 
 echo "[ BUILD RELEASE ]"
 run_builder='go build -v'
-$run_builder -ldflags "-X $info" -o "bin/redis-shake" "./src/redis-shake/main/main.go"
+$run_builder -ldflags "-X $info" -o "${output}/redis-shake" "./src/redis-shake/main/main.go"
 echo "build successfully!"
 
+# copy scripts
+cp scripts/start.sh ${output}/
+cp scripts/stop.sh ${output}/
+
 if [ "Linux" == "$(uname -s)" ];then
 	# hypervisor
 	gcc -Wall -O3 scripts/hypervisor.c -o ${output}/hypervisor -lpthread