build: Rename Makecheck.am to just check.am

The original name was confusing with Makefile.am, let's be more clear.

Makefile.am

@@ -138,7 +138,7 @@ test_data = \
 	test/100_critic/perlcriticrc \
 	$(nil)
 
-include $(top_srcdir)/Makecheck.am
+include $(top_srcdir)/check.am
 
 .PHONY: update-po
 

scripts/Makefile.am

@@ -293,7 +293,7 @@ refresh-test-data: $(test_data_objects)
 	  >$(srcdir)/t/200_Dpkg_Shlibs/objdump.patterns
 	$(OBJDUMP) `which ls` >$(srcdir)/t/200_Dpkg_Shlibs/objdump.ls
 
-include $(top_srcdir)/Makecheck.am
+include $(top_srcdir)/check.am
 
 clean-local: check-clean coverage-clean
 	rm -fr man

src/Makefile.am

@@ -93,6 +93,6 @@ test_tmpdir = t.tmp
 test_cases = \
 	t/100_dpkg_divert.t
 
-include $(top_srcdir)/Makecheck.am
+include $(top_srcdir)/check.am
 
 clean-local: check-clean

utils/Makefile.am

@@ -57,6 +57,6 @@ test_tmpdir = t.tmp
 test_cases = \
 	t/100_update_alternatives.t
 
-include $(top_srcdir)/Makecheck.am
+include $(top_srcdir)/check.am
 
 clean-local: check-clean