fixup! libtool does not build anymore without m4

component/libtool/buildout.cfg

 [buildout]
 extends =
+  ../m4/buildout.cfg
   ../xz-utils/buildout.cfg
 parts = libtool
 

component/tesseract/buildout.cfg

@@ -33,7 +33,7 @@ configure-command =
 # tesseract has a non-standard way of testing for leptonica, hence the
 # LIBLEPT_HEADERSDIR entry below:
 environment =
-  PATH=${autoconf:location}/bin:${automake:location}/bin:${libtool:location}/bin:%(PATH)s
+  PATH=${autoconf:location}/bin:${automake:location}/bin:${libtool:location}/bin:${m4:location}/bin:%(PATH)s
   ACLOCAL_ARGS=-I${libtool:location}/share/aclocal
   LIBLEPT_HEADERSDIR=${leptonica:location}/include
   CPPFLAGS=-I${leptonica:location}/include