Do not remove check.info during 'clean' target
Do not remove check.info during 'clean' target

It was observed that if one does not have texinfo installed
and invoked "make clean" then a subsequent build will fail
because the docs cannot be built. The issue is that
"make clean" will remove check.info and require it be rebuilt.

git-svn-id: caee63afe878fe2ec7dbba394a86c9654d9110ca@1198 64e312b2-a51f-0410-8e61-82d0ca0eb02a

svn2github/check,svn2github/check,svn2github/check,svn2github/check,svn2github/check