Travis: added px4-v4 to the travis build

Tools/scripts/build_all_travis.sh

@@ -9,7 +9,7 @@ set -ex
 
 # If TRAVIS_BUILD_TARGET is not set, default to all of them
 if [ -z "$TRAVIS_BUILD_TARGET" ]; then
-    TRAVIS_BUILD_TARGET="sitl linux navio raspilot minlure px4-v2"
+    TRAVIS_BUILD_TARGET="sitl linux navio raspilot minlure px4-v2 px4-v4"
 fi
 
 declare -A build_platforms
@@ -17,7 +17,7 @@ declare -A build_concurrency
 declare -A build_extra_clean
 
 build_platforms=(  ["ArduPlane"]="navio raspilot minlure sitl linux px4-v2"
-                   ["ArduCopter"]="navio raspilot minlure sitl linux px4-v2"
+                   ["ArduCopter"]="navio raspilot minlure sitl linux px4-v2 px4-v4"
                    ["APMrover2"]="navio raspilot minlure sitl linux px4-v2"
                    ["AntennaTracker"]="navio raspilot minlure sitl linux px4-v2"
                    ["Tools/Replay"]="linux")
@@ -27,7 +27,8 @@ build_concurrency=(["navio"]="-j2"
                    ["minlure"]="-j2"
                    ["sitl"]="-j2"
                    ["linux"]="-j2"
-                   ["px4-v2"]="")
+                   ["px4-v2"]=""
+                   ["px4-v4"]="")
 
 build_extra_clean=(["px4-v2"]="make px4-cleandep")