Bug 1558769 [wpt PR 17287] - Fix #17286: TC needs to update the apt database before installing, a=testonly

Automatic update from web-platform-tests
Fix #17286: TC needs to update the apt database before installing (#17287)

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wp5At-commits: bbfea06cb188fbe7b7004bd838ccbfb4f50f429c
wpt-pr: 17287

testing/web-platform/tests/.taskcluster.yml

@@ -234,6 +234,7 @@ tasks:
           script: >-
             export TOXENV=py36;
             export HYPOTHESIS_PROFILE=ci;
+            sudo apt update -qqy;
             sudo apt install -qqy python3-pip;
             ./tools/ci/run_tc.py \
               tools_unittest \
@@ -246,6 +247,7 @@ tasks:
             Integration tests for wpt commands
           script: >-
             export TOXENV=py27;
+            sudo apt update -qqy;
             sudo apt install -qqy libnss3-tools;
             ./tools/ci/run_tc.py \
               --oom-killer \
@@ -274,6 +276,7 @@ tasks:
           description: >-
             Smoketests for wptrunner
           script: >-
+            sudo apt update -qqy;
             sudo apt install -qqy libnss3-tools libappindicator1 fonts-liberation;
             ./tools/ci/run_tc.py \
               --oom-killer \