make sure build.sh in Travis is executable
make sure build.sh in Travis is executable

this update is also in "framework 462". I'm seeing Travis error sporadicly at times without this set.

duplicati/duplicati,duplicati/duplicati,mnaiman/duplicati,duplicati/duplicati,mnaiman/duplicati,mnaiman/duplicati,mnaiman/duplicati,duplicati/duplicati,duplicati/duplicati,mnaiman/duplicati