Travis: Make Chutney output more readable

* Use a shorter name for the chutney make target
* Put the chutney make target first, when using a custom target

Part of 33280.

.travis.yml

@@ -35,7 +35,7 @@ env:
     ## triggered by Ubuntu Xenial and Bionic. See #32722.
     - CHUTNEY_TOR_SANDBOX="0"
     ## The default target for chutney jobs
-    - CHUTNEY_MAKE_TARGET="test-network-all"
+    - CHUTNEY_MAKE="test-network-all"
   matrix:
     ## This matrix entry is required, but it doesn't actually create any jobs
     -
@@ -45,7 +45,7 @@ matrix:
   include:
     ## We run chutney on macOS, because macOS Travis has IPv6
     ## But we only run the IPv6 chutney tests, to speed up the job
-    - env: CHUTNEY="yes" CHUTNEY_ALLOW_FAILURES="2" SKIP_MAKE_CHECK="yes" CHUTNEY_MAKE_TARGET="test-network-ipv6"
+    - env: CHUTNEY_MAKE="test-network-ipv6" CHUTNEY="yes" CHUTNEY_ALLOW_FAILURES="2" SKIP_MAKE_CHECK="yes"
       os: osx
 
     ## We also run basic tests on macOS
@@ -112,7 +112,7 @@ matrix:
 
     ## Since we're actively developing IPv6, we want to require the IPv6
     ## chutney tests
-    #- env: CHUTNEY="yes" CHUTNEY_ALLOW_FAILURES="2" SKIP_MAKE_CHECK="yes" CHUTNEY_MAKE_TARGET="test-network-ipv6"
+    #- env: CHUTNEY_MAKE="test-network-ipv6" CHUTNEY="yes" CHUTNEY_ALLOW_FAILURES="2" SKIP_MAKE_CHECK="yes"
     #  os: osx
 
 ## (Linux only) Use a recent Linux image (Ubuntu Bionic)
@@ -245,7 +245,7 @@ script:
   ## We run `make check` because that's what https://jenkins.torproject.org does.
   - if [[ "$SKIP_MAKE_CHECK" == "" ]]; then make check; fi
   - if [[ "$DISTCHECK" != "" ]]; then make distcheck DISTCHECK_CONFIGURE_FLAGS="$CONFIGURE_FLAGS"; fi
-  - if [[ "$CHUTNEY" != "" ]]; then make "$CHUTNEY_MAKE_TARGET"; fi
+  - if [[ "$CHUTNEY" != "" ]]; then make "$CHUTNEY_MAKE"; fi
   ## Diagnostic for bug 29437: kill stem if it hangs for 9.5 minutes
   ## Travis will kill the job after 10 minutes with no output
   - if [[ "$TEST_STEM" != "" ]]; then make src/app/tor; timelimit -p -t 540 -s USR1 -T 30 -S ABRT python3 "$STEM_SOURCE_DIR"/run_tests.py --tor src/app/tor --integ --test control.controller --test control.base_controller --test process --log TRACE --log-file stem.log; fi