Build: split API/ACI checks into separate Makefile targets

This is temporary workaround. makeapi/makeaci transitively import
ipaplatform, which will not exist before configure is executed.
On the other hand, configure requires version.m4,
which is generated by current Makefile.

This change works around this chicked-egg problem. It will disappear
when we start using top-level configure to generate top-level Makefile.

https://fedorahosted.org/freeipa/ticket/6418

Reviewed-By: Lukas Slebodnik <lslebodn@redhat.com>
Reviewed-By: Stanislav Laznicka <slaznick@redhat.com>
Reviewed-By: Christian Heimes <cheimes@redhat.com>

Makefile

@@ -148,7 +148,7 @@ po-validate:
 jslint:
 	cd install/ui; jsl -nologo -nosummary -nofilelisting -conf jsl.conf || $(LINT_IGNORE_FAIL)
 
-lint: pylint po-validate jslint
+lint: apilint acilint pylint po-validate jslint
 
 test:
 	./make-test
@@ -198,10 +198,11 @@ version-update: release-update ipapython/version.py ipaplatform/__init__.py ipas
 	sed -e s/__VERSION__/$(IPA_VERSION)/ client/version.m4.in \
 		> client/version.m4
 
-	if [ "$(SKIP_API_VERSION_CHECK)" != "yes" ]; then \
-		./makeapi --validate && \
-		./makeaci --validate; \
-	fi
+apilint: bootstrap-autogen
+	./makeapi --validate
+
+acilint: bootstrap-autogen
+	./makeaci --validate
 
 server: version-update
 	cd ipaserver && $(PYTHON) setup.py build