[RESEND PATCH 3/3] selftests: simplify run_tests

[Yauheni Kaliuta <yauheni.kaliuta@redhat.com>]

Remove redundant check for TEST_PROGS and use the same command for
in- and out-of-source builds, and

fix bug with adding $(OUTPUT)/ to first $(TEST_PROGS) element only:

1) use $(addprefix ...) function to add $(OUTPUT). In case of blank
$(TEST_PROGS) it will be expanded to blank, so no need for extra
check;

2) $(OUTPUT) is always initialized to current dir or supplied value,
so it does not make any harm to add it unconditionally.

Signed-off-by: Yauheni Kaliuta <yauheni.kaliuta@redhat.com>
---
 tools/testing/selftests/lib.mk | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index 7a17ea815736..fac4f7de37fb 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -73,14 +73,9 @@ ifdef building_out_of_srctree
 	@if [ "X$(TEST_PROGS)$(TEST_PROGS_EXTENDED)$(TEST_FILES)" != "X" ]; then \
 		rsync -aq $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES) $(OUTPUT); \
 	fi
-	@if [ "X$(TEST_PROGS)" != "X" ]; then \
-		$(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) $(OUTPUT)/$(TEST_PROGS)) ; \
-	else \
-		$(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS)); \
-	fi
-else
-	@$(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) $(TEST_PROGS))
 endif
+	@$(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) \
+			   $(addprefix $(OUTPUT)/,$(TEST_PROGS)))
 
 define INSTALL_SINGLE_RULE
 	$(if $(INSTALL_LIST),@mkdir -p $(INSTALL_PATH))
-- 
2.26.2