travis: name the test jobs

.travis.yml

@@ -54,15 +54,20 @@ matrix:
     - if: type != cron
       compiler: "gcc"
       env: CI_BUILD_TARGET="sitltest-copter-tests2 sitltest-heli"
+      name: sitltest-copter-tests2 sitltest-heli
     - if: type != cron
       compiler: "gcc"
       env: CI_BUILD_TARGET="sitltest-copter-tests1"
+      name: sitltest-copter-tests1
     - if: type != cron
       compiler: "gcc"
       env: CI_BUILD_TARGET="sitltest-tracker sitltest-quadplane sitltest-plane"
+      name: sitltest-tracker sitltest-quadplane sitltest-plane
     - if: type != cron
       compiler: "clang"
       env: CI_BUILD_TARGET="sitltest-rover sitltest-sub sitltest-balancebot navigator unit-tests"
+      name: sitltest-rover sitltest-sub sitltest-balancebot navigator unit-tests
     - if: type != cron
       compiler: "clang"
       env: CI_BUILD_TARGET="revo-bootloader periph-build CubeOrange-bootloader iofirmware stm32f7 stm32h7 fmuv2-plane sitl"
+      name: revo-bootloader periph-build CubeOrange-bootloader iofirmware stm32f7 stm32h7 fmuv2-plane sitl