test: Update travis build to include a basic klippy host test

Move the travis installation steps from the travis-build.sh script to
a new script (scripts/travis-install.sh).  Move the travis-build.sh
script to the scripts/ directory as well.

The data dictionaries built in the compile tests are useful during
host software testing, so run all the compile tests sequentially in a
single VM and save the data dictionaries after each build.  Also,
build all the config files found in the test/configs/ directory.

Create the python virtualenv environment during the install phase and
invoke the klippy.py host software in the build phase to perform a
basic host software sanity check.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

.travis.yml

@@ -1,20 +1,13 @@
+# This is a travis-ci.org continuous integration configuration file.
 language: c
 
 addons:
     apt:
-        sourceline: 'ppa:team-gcc-arm-embedded/ppa'
         packages:
             - gcc-avr
             - avr-libc
             - wget
 
-env:
-    - TARGET=atmega2560-16mhz
-    - TARGET=atmega328-16mhz
-      # - TARGET=beaglebone needs pru-gcc (not out of the box available on Ubuntu)
-    - TARGET=hostsimulator
-    - TARGET=linuxprocess
-    - TARGET=sam3x8e GCC_SRC=https://developer.arm.com/-/media/Files/downloads/gnu-rm/7-2017q4/gcc-arm-none-eabi-7-2017-q4-major-linux.tar.bz2 GCC_DIR=gcc-arm-none-eabi-7-2017-q4-major
-
-script: ./test/travis-build.sh
+install: ./scripts/travis-install.sh
 
+script: ./scripts/travis-build.sh