fixed WebDriverTest may not exists

Author: vvavrychuk

build.sh

@@ -26,8 +26,11 @@ do
     [ $? -ne 0 ] && exit 1
     cd ../../..
     mkdir -p bin/$platform/$mode/
-    cp -f out/$platform/$mode/Default/libWebDriver.a bin/$platform/$mode/ 2>/dev/null
+    cp -f out/$platform/$mode/Default/libWebDriver.a bin/$platform/$mode/
     cp -f out/$platform/$mode/Default/lib.target/libWebDriver.so bin/$platform/$mode/ 2>/dev/null
-    cp -f out/$platform/$mode/Default/WebDriverTest bin/$platform/$mode/ 2>/dev/null
+    if [ -f out/$platform/$mode/Default/WebDriverTest ]
+    then
+      cp -f out/$platform/$mode/Default/WebDriverTest bin/$platform/$mode/
+    fi
   done
 done