Allow warnings in re-runs of upstream validation tests

With UCO CP-100, validation results will include allowing
`sh:conforms true` with `sh:Info`-severity `sh:ValidationResult`s.

No effect was observed on Make-managed files in this test subdirectory.

References:
* [UCO OC-12] (CP-100) UCO's idea of "Open vocabulary" does not agree
  with its implementation with owl:oneOf

Signed-off-by: Alex Nelson <alexander.nelson@nist.gov>

Author: ajnelson-nist

tests/case_utils/case_validate/case_test_examples/Makefile

@@ -48,6 +48,7 @@ all: \
 	rm -f __$@ _$@
 	source $(tests_srcdir)/venv/bin/activate \
 	  && case_validate \
+	    --allow-warnings \
 	    --debug \
 	    --format turtle \
 	    --output __$@ \

tests/case_utils/case_validate/uco_test_examples/Makefile

@@ -52,6 +52,7 @@ all: \
   $(top_srcdir)/case_utils/ontology/__init__.py
 	source $(tests_srcdir)/venv/bin/activate \
 	  && case_validate \
+	    --allow-warnings \
 	    --debug \
 	    --format turtle \
 	    $< \