travis: increase timeout

Since packages are no longer built from this repository, there is a
little more time for the iso build.

.travis.yml

@@ -4,7 +4,7 @@ language: generic
 install: git clone https://github.com/QubesOS/qubes-builder ~/qubes-builder
 script: 
  - ~/qubes-builder/scripts/travis-build
- - travis_wait 35 $EXPECT_FAILURE make -C ~/qubes-builder iso BUILDERCONF=scripts/travis-builder.conf VERBOSE=0 COMPONENTS=installer-qubes-os
+ - travis_wait 45 $EXPECT_FAILURE make -C ~/qubes-builder iso BUILDERCONF=scripts/travis-builder.conf VERBOSE=0 COMPONENTS=installer-qubes-os
 after_script:
  - tail -n 100 ~/qubes-builder/build-logs/installer-qubes-os-iso-*.log
  - ls -l ~/qubes-builder/iso