Update bbdb.rcp to be compatible with current version of bbdb

Recently I was unable to build bbdb through el-get. 

configure.ac:33: error: possibly undefined macro: AM_INIT_AUTOMAKE
      If this token and others are legitimate, please use m4_pattern_allow.
      See the Autoconf documentation.
configure.ac:35: error: possibly undefined macro: AC_PACKAGE_DATE
configure.ac:41: error: possibly undefined macro: AM_PATH_LISPDIR

I found by googling that build scripts in bbdb is different now: https://savannah.nongnu.org/bugs/?38780#comment5

With this patch I was able to build bbdb.