DAOS-15779 control: Explicitly link to libgurt in cgo

[kjacque]

Lack of it was causing failures in the Ubuntu build.

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[kjacque]

No need for a test-tag -- this was a build issue.

[github-actions]

Ticket title is 'Build DAOS (ubuntu docker) is failing'
Status is 'In Review'
https://daosio.atlassian.net/browse/DAOS-15779

[daosbuild1]

Test stage Functional Hardware Medium Verbs Provider completed with status FAILURE. https://build.hpdd.intel.com//job/daos-stack/job/daos/view/change-requests/job/PR-14388/1/execution/node/1454/log

[kjacque]

Test failure is a timeout in the daos_test extend_simple test. There are a number of existing tickets involving this test and timeouts. This PR does not seem related.