Revert "Update ctx->errlog after logging"
Revert "Update ctx->errlog after logging"

This reverts commit 18eaffc65fb9e80d62d1a692f74e50c7bb5bec52.

It breaks logging feature. We should not use ctx->errbuf in log
argument.

groonga/groonga,groonga/groonga,naoa/groonga,komainu8/groonga,kenhys/groonga,kenhys/groonga,naoa/groonga,komainu8/groonga,naoa/groonga,kenhys/groonga,naoa/groonga,komainu8/groonga,groonga/groonga,komainu8/groonga,naoa/groonga,naoa/groonga,groonga/groonga,komainu8/groonga,kenhys/groonga,kenhys/groonga,groonga/groonga,kenhys/groonga,naoa/groonga,komainu8/groonga,kenhys/groonga,naoa/groonga,komainu8/groonga,groonga/groonga,groonga/groonga,kenhys/groonga,groonga/groonga,komainu8/groonga