Merge branch 'core-updates'

gnu-system.am

gnu/packages/attr.scm

gnu/packages/autotools.scm

gnu/packages/backup.scm

gnu/packages/base.scm

gnu/packages/bash.scm

gnu/packages/bdw-gc.scm

gnu/packages/cmake.scm

gnu/packages/commencement.scm

gnu/packages/compression.scm

gnu/packages/cross-base.scm

gnu/packages/databases.scm

gnu/packages/doxygen.scm

gnu/packages/emacs.scm

gnu/packages/file.scm

gnu/packages/flex.scm

gnu/packages/gawk.scm

gnu/packages/gcc.scm

gnu/packages/gettext.scm

gnu/packages/glib.scm