- comment for AC_DEFINE(HAVE_COMPRESS) fixed
- build convenience library from zlib: we need to compile it into both
  libmysqlclient.a and libmysqlclient.so
- --with-zlib-dir=bundled configure option


acinclude.m4:
  - MYSQL_CHECK_ZLIB_WITH_COMPRESS: added support for 
  --with-zlib-dir=bundled
  - AC_DEFINE comment fixed
tools/Makefile.am:
  - uncomment bin_PROGRAMS (typo fixed)
zlib/Makefile.am:
  - build libtool convenience library, not static one: we need libz objects
    to be compiled in libmysqlclient.so shared version