Merge branch 'sg/clean-test-results'

"make clean" stopped cleaning the test results directory as a side
effect of a topic that has nothing to do with "make clean", which
has been corrected.

* sg/clean-test-results:
  t/Makefile: remove 'test-results' on 'make clean'

Author: gitster

contrib/subtree/t/Makefile

@@ -51,6 +51,7 @@ clean-except-prove-cache:
 	$(RM) -r valgrind/bin
 
 clean: clean-except-prove-cache
+	$(RM) -r '$(TEST_RESULTS_DIRECTORY_SQ)'
 	$(RM) .prove
 
 test-lint: test-lint-duplicates test-lint-executable test-lint-shell-syntax

t/Makefile

@@ -73,6 +73,7 @@ clean-except-prove-cache: clean-chainlint
 	$(RM) -r valgrind/bin
 
 clean: clean-except-prove-cache
+	$(RM) -r '$(TEST_RESULTS_DIRECTORY_SQ)'
 	$(RM) .prove
 
 clean-chainlint: