Don't emit build logs to stdout if xcpretty is not present

Author: fealebenpae

build/scripts/build.sh

@@ -5,7 +5,7 @@ set -e
 WORKSPACE=`pwd`
 
 function xcodebuild_pretty {
-    XCFORMATTER=tee
+    XCFORMATTER=true
     if hash xcpretty 2>/dev/null; then
         XCFORMATTER=xcpretty
     fi
@@ -84,4 +84,4 @@ xcrun -sdk iphoneos PackageApplication -v "$WORKSPACE/cmake-build/tests/TestRunn
          >> "$WORKSPACE/build.log" 2>&1
 TestRunner/Debug-iphoneos/TestRunner.app" \
     -o "$WORKSPACE/cmake-build/tests/TestRunner/Debug-iphoneos/TestRunner.ipa" \
-         >> "$WORKSPACE/build.log" 2>&1
+         >> "$WORKSPACE/build.log" 2>&1