Update Travis CI gcc version

Author: digitalentity

Diff for: .travis.yml

@@ -28,7 +28,7 @@ before_install:
 
 install:
   - ./install-toolchain.sh
-  - export TOOLCHAINPATH=$PWD/gcc-arm-none-eabi-6-2017-q2-update/bin
+  - export TOOLCHAINPATH=$PWD/gcc-arm-none-eabi-7-2018-q2-update/bin
   - export PATH=$TOOLCHAINPATH:$PATH
 
 before_script:
@@ -41,7 +41,7 @@ script: ./.travis.sh
 cache: 
   apt: true
   directories:
-  - $PWD/gcc-arm-none-eabi-6-2017-q2-update
+  - $PWD/gcc-arm-none-eabi-7-2018-q2-update
 
 notifications:
   #slack: inavflight:UWRoWFJ4cbbpHXT8HJJlAPXa

Diff for: install-toolchain.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
 
-if [ ! -d $PWD/gcc-arm-none-eabi-6_2-2016q4/bin ] ; then
-    curl --retry 10 --retry-max-time 120 -L "https://armkeil.blob.core.windows.net/developer/Files/downloads/gnu-rm/6-2017q2/gcc-arm-none-eabi-6-2017-q2-update-linux.tar.bz2" | tar xfj -
+if [ ! -d $PWD/gcc-arm-none-eabi-7-2018-q2-update/bin ] ; then
+    curl --retry 10 --retry-max-time 120 -L "https://armkeil.blob.core.windows.net/developer/Files/downloads/gnu-rm/7-2018q2/gcc-arm-none-eabi-7-2018-q2-update-linux.tar.bz2" | tar xfj -
 fi