CI: increase build directory size

- Fix typo in the build-debugging bits
 - Increase tmpfs size of /build because it looks like "make install"
   ends up filling the disk, and then it fails.

.travis.yml

@@ -16,5 +16,5 @@ install:
   - docker build -t calamares .
 
 script:
-  - docker run -v $PWD:/src --tmpfs /build:rw,size=65536k -e SRCDIR=/src -e BUILDDIR=/build calamares "/src/ci/travis.sh"
+  - docker run -v $PWD:/src --tmpfs /build:rw,size=81920k -e SRCDIR=/src -e BUILDDIR=/build calamares "/src/ci/travis.sh"
 

ci/travis-continuous.sh

@@ -49,6 +49,6 @@ echo "# System status"
 df -h
 
 echo "# Install results"
-install_debug "$DESTDIR"
+install_debugging "$DESTDIR"
 
 $result  # Result of make install, above