Change travis arm tests to use gcc-arm-embedded v5

.travis.yml

@@ -44,9 +44,9 @@ before_script:
   ## in Ubuntu >= 14.04, but this external PPA is needed for 12.04.
   ## Install srecord
   - if [ ${BUILD_ARCH:-0} = arm-aapcs ] ; then
-      sudo add-apt-repository -y ppa:terry.guo/gcc-arm-embedded &&
+      sudo add-apt-repository -y ppa:team-gcc-arm-embedded/ppa &&
       sudo apt-get -qq update &&
-      sudo apt-get -qq install gcc-arm-none-eabi srecord &&
+      sudo apt-get -qq install gcc-arm-embedded srecord &&
       arm-none-eabi-gcc --version ;
     fi