Quiet UFS build module load

Module loading in the UFS build script now sets +x first to turn off
the command trace.

Refs: NOAA-EMC#366, NOAA-EMC#368, NOAA-EMC#374

sorc/build_ufs.sh

@@ -40,8 +40,10 @@ MOD_PATH=$cwd/ufs_model.fd/modulefiles
 module purge
 
 cd ufs_model.fd/
+set +x
 module use ${MOD_PATH}
 module load ufs_${target}
+set -x
 
 # Remove previous build directory if it exists
 if [ -d build ]; then