* gnu/packages/autotools.scm (automake)[native-search-paths]: New field.
* gnu/packages/guile.scm (guile-1.8)[native-search-paths]: New field.
(guile-2.0)[native-search-paths]: New field.
* gnu/packages/python.scm (python)[native-search-paths]: New field.
* gnu/packages/autotools.scm (autoconf-wrapper): New variable.
(automake): Use AUTOCONF-WRAPPER instead of AUTOCONF.
Add `automake-skip-amhello-tests.patch' as an input.
Add #:patches and #:phases arguments.
* gnu/packages/patches/automake-skip-amhello-tests.patch: New file.
* Makefile.am (dist_patch_DATA): Add it.