[PATCH olang 1/2] build: add clean target on root Makefile

[Johnny Richard <johnny@johnnyrichard.com>]

In order to make easier recompile the whole project and start from a
fresh environemnt, this patch introduce a **clean** target on project
root Makefile which uses the tests/unit and tests/integration **clean**.

Signed-off-by: Johnny Richard <johnny@johnnyrichard.com>
---
 Makefile | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Makefile b/Makefile
index ea6ba53..662d039 100644
--- a/Makefile
+++ b/Makefile
@@ -38,6 +38,12 @@ unit-test:
 	$(MAKE)
 	$(MAKE) -C tests/unit/
 
+.PHONY: clean
+clean:
+	$(MAKE) -C tests/integration/ clean
+	$(MAKE) -C tests/unit/ clean
+	@rm -rf build/ 0c
+
 .PHONY: check
 check:
 	$(MAKE)
-- 
2.43.2