Merge branch 'core-updates'

Makefile.am

doc/guix.texi

gnu/packages/autotools.scm

gnu/packages/avahi.scm

gnu/packages/base.scm

gnu/packages/bootstrap.scm

gnu/packages/cross-base.scm

gnu/packages/curl.scm

gnu/packages/dwm.scm

gnu/packages/emacs.scm

gnu/packages/fontutils.scm

gnu/packages/gawk.scm

gnu/packages/gcc.scm

gnu/packages/ghostscript.scm

gnu/packages/glib.scm

gnu/packages/guile.scm

gnu/packages/lesstif.scm

gnu/packages/linux.scm

gnu/packages/make-bootstrap.scm

gnu/packages/multiprecision.scm