selftests: tc-testing: remove spurious './' from Makefile

Patchwork CI didn't like the extra './', so remove it.

Signed-off-by: Pedro Tammela <[email protected]>
Acked-by: Jamal Hadi Salim <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: tammela

tools/testing/selftests/tc-testing/Makefile

@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 
-TEST_PROGS += ./tdc.sh
+TEST_PROGS += tdc.sh
 TEST_FILES := action-ebpf tdc*.py Tdc*.py plugins plugin-lib tc-tests scripts
 
 include ../lib.mk