Silence output of wabt installation commands in build.sh

Author: Gioee

build.sh

@@ -5,10 +5,10 @@ setup() {
     else
         if [ "$(uname -s | tr '[:upper:]' '[:lower:]')" = "darwin" ]; then
             CPUS=$(sysctl -n hw.ncpu)
-            brew install wabt
+            brew install wabt >/dev/null 2>&1
         else
             CPUS=$(nproc)
-            sudo apt-get update && sudo apt-get -y install wabt
+            sudo apt-get update >/dev/null 2>&1 && sudo apt-get install -y wabt >/dev/null 2>&1
         fi
     fi
     echo "$CPUS"