Updated for bad variable part 4.

Author: Tony Sansone

Makefile

@@ -1,7 +1,7 @@
-if [-z ${GIT_BRANCH}]
+if [-z "${GIT_BRANCH}"]
   GIT_BRANCH=`$(shell git rev-parse --abbrev-ref HEAD)`
 fi
-if [-z ${USER}]
+if [-z "${USER}"]
   USER=`whoami`
 fi
 STAGING_URL="https://docs-mongodborg-staging.corp.mongodb.com"