Apply some minor fixes found in review

agent/bench-scripts/driver/linpack

@@ -42,7 +42,7 @@ numactl_args=""
 # Output directory, defaults to the current working directory if not provided.
 output_dir=""
 
-# The linpack driver always perform pre-checks. When requested, the driver will
+# The linpack driver always performs pre-checks. When requested, the driver will
 # only run the pre-check and exit.
 pre_check_only=0
 

agent/bench-scripts/test-bin/uperf

@@ -6,6 +6,7 @@ echo "$0 $*" >> $_testlog
 if [[ "${1}" == "-V" ]]; then 
 	echo "Uperf Version ${_BM_UPERF_VER:-1.0.42}"
 	echo "... garbage to be ignored ..."
+	exit 0
 fi
 
 exit ${_BM_UPERF_STS:-0}