Merge branch 'core-updates'

gnu-system.am

gnu/packages/acl.scm

gnu/packages/admin.scm

gnu/packages/base.scm

gnu/packages/bdw-gc.scm

gnu/packages/commencement.scm

gnu/packages/cyrus-sasl.scm

gnu/packages/file.scm

gnu/packages/gawk.scm

gnu/packages/gcc.scm

gnu/packages/gnutls.scm

gnu/packages/guile.scm

gnu/packages/image.scm

gnu/packages/libffi.scm

gnu/packages/libunistring.scm

gnu/packages/linux.scm

gnu/packages/mc.scm

gnu/packages/mcrypt.scm

gnu/packages/patches/coreutils-dummy-man.patch

gnu/packages/patches/coreutils-skip-nohup.patch