NOT FOR REVIEW: Try to fix tf-a-coverity scripts.

Change-Id: I67f797cf8c42c73870ef01508c9c14a6fd94698f
diff --git a/tf-a-coverity.yaml b/tf-a-coverity.yaml
index 90bcea2..38fba6b 100644
--- a/tf-a-coverity.yaml
+++ b/tf-a-coverity.yaml
@@ -77,14 +77,21 @@
             - shell: |
                 #!/bin/bash
                 echo "Uploading tarball to Coverity Scan Online..."
+
+                pwd
+                cd ${WORKSPACE}/trusted-firmware-a
+
                 GIT_COMMIT=$(git rev-parse HEAD)
+
+                set -x
                 curl \
-                  --form token=${{TF_COVERITY_SCAN_TOKEN}} \
+                  --form token="${TF_COVERITY_SCAN_TOKEN}" \
                   --form email=sandrine.bailleux@arm.com \
                   --form file=@"arm-tf-coverity-results.tgz" \
-                  --form version="Commit ${{GIT_COMMIT}}" \
-                  --form description="Build ${{BUILD_DISPLAY_NAME}}" \
+                  --form version="Commit ${GIT_COMMIT}" \
+                  --form description="Build ${BUILD_DISPLAY_NAME}" \
                   https://scan.coverity.com/builds?project=ARM-software%2Farm-trusted-firmware
+                set +x
     publishers:
         - archive:
             artifacts: 'trusted-firmware-a/arm-tf-coverity-results.tgz, trusted-firmware-a/tf_coverage.log'