[chore] Add Makefile phonies (#44)

Cf. koreader/koreader-base#875

docker/ubuntu/baseimage-clang/Makefile

@@ -10,3 +10,5 @@ shell:
 
 push:
 	docker push $(USER)/kobase-clang:$(VERSION)
+
+.PHONY: all clean test push shell

docker/ubuntu/baseimage-python/Makefile

@@ -10,3 +10,5 @@ shell:
 
 push:
 	docker push $(USER)/kobase-python:$(VERSION)
+
+.PHONY: all clean test push shell

docker/ubuntu/baseimage/Makefile

@@ -10,3 +10,5 @@ shell:
 
 push:
 	docker push $(USER)/kobase:$(VERSION)
+
+.PHONY: all clean test push shell

docker/ubuntu/koandroid/Makefile

@@ -10,3 +10,5 @@ shell:
 
 push:
 	docker push $(USER)/koandroid:$(VERSION)
+
+.PHONY: all clean test push shell

docker/ubuntu/koappimage/Makefile

@@ -10,3 +10,5 @@ shell:
 
 push:
 	docker push $(USER)/koappimage:$(VERSION)
+
+.PHONY: all clean test push shell

docker/ubuntu/kocervantes/Makefile

@@ -10,3 +10,5 @@ shell:
 
 push:
 	docker push $(USER)/kocervantes:$(VERSION)
+
+.PHONY: all clean test push shell

docker/ubuntu/kokindle/Makefile

@@ -10,3 +10,5 @@ shell:
 
 push:
 	docker push $(USER)/kokindle:$(VERSION)
+
+.PHONY: all clean test push shell

docker/ubuntu/kokobo/Makefile

@@ -10,3 +10,5 @@ shell:
 
 push:
 	docker push $(USER)/kokobo:$(VERSION)
+
+.PHONY: all clean test push shell

docker/ubuntu/kopb/Makefile

@@ -10,3 +10,5 @@ shell:
 
 push:
 	docker push $(USER)/kopb:$(VERSION)
+
+.PHONY: all clean test push shell

docker/ubuntu/kout/Makefile

@@ -10,3 +10,5 @@ shell:
 
 push:
 	docker push $(USER)/kout:$(VERSION)
+
+.PHONY: all clean test push shell