Enable arm-linux-gnueabi-gcc build on Travis

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
diff --git a/.travis.yml b/.travis.yml
index 48faa48..8fa0b34 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,6 +14,7 @@
           - graphviz
           - gcc-arm-none-eabi
           - libnewlib-arm-none-eabi
+          - gcc-arm-linux-gnueabi
       language: python # Needed to get pip for Python 3
       python: 3.5 # version from Ubuntu 16.04
       install:
@@ -22,7 +23,7 @@
         - tests/scripts/all.sh -k 'check_*'
         - tests/scripts/all.sh -k test_default_out_of_box
         - tests/scripts/all.sh -k test_ref_configs
-        - tests/scripts/all.sh -k build_arm_none_eabi_gcc_arm5vte build_arm_none_eabi_gcc_m0plus
+        - tests/scripts/all.sh -k build_arm_linux_gnueabi_gcc_arm5vte build_arm_none_eabi_gcc_m0plus
 
     - name: full configuration
       script: