(ITS#8509) LMDB make targets for automake

[phantom+lmdb@live.ie]

Full_Name: Aido
Version: 2.4.44
OS: Ubuntu Trusty
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (216.239.90.19)


The current liblmdb Makefile does not make it easy to use liblmdb as a
submodule
to other projects that utilize automake e.g. automake uses a 'check' directive
instead of 'test'.

Adding the following to the Makefile would make liblmdb more automake
friendly:

EMPTY_AUTOMAKE_TARGETS = dvi pdf ps info html tags ctags distcheck
.PHONY: $(EMPTY_AUTOMAKE_TARGETS)
$(EMPTY_AUTOMAKE_TARGETS):
check: test

See:
https://www.gnu.org/software/automake/manual/html_node/Third_002dParty-Makefiles.html