* common/aclocal.m4: Add include of ../../config/zlib.m4.

    * common/aclocal.m4: Add include of ../../config/zlib.m4.
        * common/common.m4: Use AM_ZLIB to check for zlib support.
        * ppc/configure.ac: Likewise.
        * arm/configure, avr/configure, common/configure, cr16/configure,
        cris/configure, d10v/configure, erc32/configure, frv/configure,
        h8300/configure, iq2000/configure, lm32/configure, m32c/configure,
        m32r/configure, m68hc11/configure, mcore/configure,
        microblaze/configure, mips/configure, mn10300/configure,
        moxie/configure, ppc/configure, sh/configure, sh64/configure,
        v850/configure: Regenerate.