tests: fix wrapper generation

2 jobs for 141-ghdl-unit-tests-only-one-unit-test-in-run-for-all-testcases in 52 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #5346
triggered
build_ip_and_tests

00:00:40

 
  Test
failed #5347
triggered
test_ip_unit

00:00:12

 
Name Stage Failure
failed
test_ip_unit Test
fail 2 of 11
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Total time was 7.7 seconds
Elapsed time was 2.1 seconds
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Some failed!
Makefile:20: recipe for target 'test_unit' failed
make: *** [test_unit] Error 1
ERROR: Job failed: exit code 1