Added GOPATH/bin to the path in build script

Also fixed hardcoded tool name for MongoDB tools

src/go/pt-mongodb-query-digest/main.go

@@ -138,7 +138,7 @@ func main() {
 	log.SetLevel(logLevel)
 
 	if opts.Version {
-		fmt.Println("pt-mongodb-summary")
+		fmt.Println(TOOLNAME)
 		fmt.Printf("Version %s\n", Version)
 		fmt.Printf("Build: %s using %s\n", Build, GoVersion)
 		return

src/go/pt-mongodb-summary/main.go

@@ -172,7 +172,7 @@ func main() {
 	}
 
 	if opts.Version {
-		fmt.Println("pt-mongodb-summary")
+		fmt.Println(TOOLNAME)
 		fmt.Printf("Version %s\n", Version)
 		fmt.Printf("Build: %s using %s\n", Build, GoVersion)
 		return

util/build-packages

@@ -427,6 +427,7 @@ build_go_binaries() {
    GO_TOOLS_DIR="${TOOLKIT_DIR}/src/go"
    CUR_DIR=$(pwd)
    UNLINK=0               
+   export PATH=${GOPATH}/bin:${PATH}
    
    echo "GOPATH: ${GOPATH}"
    echo "Github directory: ${GITHUB_DIR}"