travis.yml: Add msp430 support.

.travis.yml

@@ -14,9 +14,13 @@ addons:
 
 install:
   - gem install ceedling
-      
+
 before_script:
+  - wget http://software-dl.ti.com/msp430/msp430_public_sw/mcu/msp430/MSPGCC/latest/exports/msp430-gcc-8.2.0.52_linux64.tar.bz2 -O /tmp/msp430-gcc.tar.b2
+  - tar -xjf /tmp/msp430-gcc.tar.b2
+  - export PATH=$PATH:$PWD/msp430-gcc-8.2.0.52_linux64/bin
   - arm-none-eabi-gcc --version
+  - msp430-elf-gcc --version
 
 script:
   # Build all examples
@@ -25,6 +29,6 @@ script:
   - cd test
   - ceedling test:all
   - cd ..
-  
+
 after_success:
   - source tools/build_success.sh