[Dovecot] libtoolize warnings when building

When building the HG checkout, I'm getting:

... libtoolize: Consider adding AC_CONFIG_MACRO_DIR([m4])' to configure.in and libtoolize: rerunning libtoolize, to keep the correct libtool macros in-tree. libtoolize: Consider adding -I m4' to ACLOCAL_AMFLAGS in Makefile.am.a Making distclean in doc

My build command looks like this:

hg pull hg update ./autogen.sh make -j distclean ./configure --prefix=/usr/local --enable-maintainer-mode make -j 4

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