GHA: cleaner output

.github/workflows/ci.yml

@@ -244,8 +244,8 @@ jobs:
 
     - name: Configure
       run: |
-          set -x
           source $GITHUB_WORKSPACE/Tools/CI-linux-environment.sh
+          set -x
 
           if test -n "$CPP11"; then export CPPSTD=c++11 && export CSTD=c11; fi
           if test -n "$CPP14"; then export CPPSTD=c++14 && export CSTD=c11; fi
@@ -273,8 +273,8 @@ jobs:
     - name: Test
       working-directory: build/build
       run: |
-          set -x
           source $GITHUB_WORKSPACE/Tools/CI-linux-environment.sh
+          set -x
 
           if test -z "$SWIGLANG"; then make $SWIGJOBS check-ccache; fi
           if test -z "$SWIGLANG"; then make $SWIGJOBS check-errors-test-suite; fi