gnu: base, commencement: Remove trailing #t from build phases.
* gnu/packages/base.scm (grep, tar, findutils)
(coreutils, coreutils-8.30, gnu-make, gnu-make-4.2)
(binutils-gold, glibc, make-glibc-locales):
(glibc/hurd-headers, tzdata): Remove trailing #t in build phases.
* gnu/packages/commencement.scm (bootar)
(gash-boot, gash-utils-boot, mes-boot):
(gzip-mesboot, gnu-make-mesboot0, bzip2-mesboot)
(bash-mesboot0, tcc-boot, diffutils-mesboot)
(patch-mesboot, sed-mesboot0, binutils-mesboot0)
(gcc-core-mesboot0, mesboot-headers, gawk-mesboot0)
(glibc-mesboot0, gcc-mesboot0, tar-mesboot)
(grep-mesboot, binutils-mesboot1, gnu-make-mesboot)
(gawk-mesboot, sed-mesboot, bash-mesboot)
(gcc-core-mesboot1, gcc-mesboot1, binutils-mesboot)
(glibc-headers-mesboot, glibc-mesboot, gcc-mesboot1-wrapper)
(gcc-mesboot, gnu-make-boot0, binutils-boot0)
(libstdc++-boot0, gcc-boot0, perl-boot0, python-boot0)
(glibc-final-with-bootstrap-bash)
(cross-gcc-wrapper, gettext-boot0, gcc-final): Remove trailing #t in
build phases.