u-boot-stable-src-release: follow u-boot and linux-libre naming conventions

Many people using FSDG compliant distributions or wanting to use one
are already familiar with linux-libre. This change renames the
resulting tarball to u-boot-libre to make it easier for people to
understand the goal of this tarball.

In addition we also rename the version from v2021.07 (which is the git
tag corresponding to the release) to 2021.07 as u-boot upstream
tarballs use that.

The revision wasn't bumped as we didn't have any releases of
u-boot-libre yet.

Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>

resources/scripts/build/release/u-boot-stable-src-release

@@ -23,11 +23,11 @@
 [ "x${DEBUG+set}" = 'xset' ] && set -v
 set -u -e
 
-version="v2021.07"
+version="2021.07"
 revision="r1"
 
 topdir="$(realpath $(dirname $(realpath $0))/../../../../)"
-tmpdir="${topdir}/release/u-boot/u-boot-${version}-${revision}"
+tmpdir="${topdir}/release/u-boot-libre/${version}-${revision}/u-boot-libre-${version}-${revision}"
 tarball="${tmpdir}.tar"
 
 printf "Building source code archive, version %s revision %s\n" "${version}" "${revision}"