Makefile: add explicit config to all mock commands

When generating RPM packages for different distros, it makes sense
to override the chosen mock config (the target distro) in the command
line, such as:

 $ make MOCK_CONFIG=epel-6-x86_64 rpm

So let's add the default value ("default" itself) to every mock command
and let the user running make to override it.
Signed-off-by: NCleber Rosa <crosa@redhat.com>

Makefile

@@ -21,6 +21,7 @@ RELEASE_COMMIT=$(shell git log --pretty=format:'%H' -n 1 $(VERSION))
 RELEASE_SHORT_COMMIT=$(shell git log --pretty=format:'%h' -n 1 $(VERSION))
 COMMIT=$(shell git log --pretty=format:'%H' -n 1)
 SHORT_COMMIT=$(shell git log --pretty=format:'%h' -n 1)
+MOCK_CONFIG=default
 
 all:
 	@echo
@@ -78,19 +79,19 @@ install:
 
 srpm: source
 	if test ! -d BUILD/SRPM; then mkdir -p BUILD/SRPM; fi
-	mock --resultdir BUILD/SRPM -D "commit $(COMMIT)" --buildsrpm --spec avocado.spec --sources SOURCES
+	mock -r $(MOCK_CONFIG) --resultdir BUILD/SRPM -D "commit $(COMMIT)" --buildsrpm --spec avocado.spec --sources SOURCES
 
 rpm: srpm
 	if test ! -d BUILD/RPM; then mkdir -p BUILD/RPM; fi
-	mock --resultdir BUILD/RPM -D "commit $(COMMIT)" --rebuild BUILD/SRPM/avocado-$(VERSION)-*.src.rpm
+	mock -r $(MOCK_CONFIG) --resultdir BUILD/RPM -D "commit $(COMMIT)" --rebuild BUILD/SRPM/avocado-$(VERSION)-*.src.rpm
 
 srpm-release: source-release
 	if test ! -d BUILD/SRPM; then mkdir -p BUILD/SRPM; fi
-	mock --resultdir BUILD/SRPM -D "commit $(RELEASE_COMMIT)" --buildsrpm --spec avocado.spec --sources SOURCES
+	mock -r $(MOCK_CONFIG) --resultdir BUILD/SRPM -D "commit $(RELEASE_COMMIT)" --buildsrpm --spec avocado.spec --sources SOURCES
 
 rpm-release: srpm-release
 	if test ! -d BUILD/RPM; then mkdir -p BUILD/RPM; fi
-	mock --resultdir BUILD/RPM -D "commit $(RELEASE_COMMIT)" --rebuild BUILD/SRPM/avocado-$(VERSION)-*.src.rpm
+	mock -r $(MOCK_CONFIG) --resultdir BUILD/RPM -D "commit $(RELEASE_COMMIT)" --rebuild BUILD/SRPM/avocado-$(VERSION)-*.src.rpm
 
 clean:
 	$(PYTHON) setup.py clean
@@ -169,6 +170,7 @@ variables:
 	@echo "RELEASE_SHORT_COMMIT: $(RELEASE_SHORT_COMMIT)"
 	@echo "COMMIT: $(COMMIT)"
 	@echo "SHORT_COMMIT: $(SHORT_COMMIT)"
+	@echo "MOCK_CONFIG: $(MOCK_CONFIG)"
 
 .PHONY: source install clean check link variables