update gentoo keywords to support gcc-10

open-iscsi and open-isns need keywording to support gcc-10, move it out
of being keyworded only for musl profiles.

remove unneeded keywords for python-exec and python-exec-conf (marked
stable)

use the full package name for the dev-lang/python-exec-conf package

Change-Id: I44eaf8c2230e9e2089a72fce46954f4336626843
Signed-off-by: Matthew Thode <mthode@mthode.org>

diskimage_builder/elements/gentoo/pre-install.d/02-gentoo-02-flags

@@ -26,18 +26,16 @@ if [[ 'amd64' == "${ARCH}" ]]; then
     echo 'sys-boot/grub grub_platforms_pc' >> /etc/portage/package.use/grub  # bios support for bios systems
 fi
 
-# tool for setting python versions
-echo "~dev-lang/python-exec-2.4.6 ~${ARCH}" >> /etc/portage/package.accept_keywords/python-exec-conf
-echo "dev-lang/python-exec-conf ~${ARCH}" >> /etc/portage/package.accept_keywords/python-exec-conf
-
 # needed to install static kernel
 echo "sys-kernel/gentoo-kernel-bin ~${ARCH}" >> /etc/portage/package.accept_keywords/kernel
 echo "virtual/dist-kernel ~${ARCH}" >> /etc/portage/package.accept_keywords/kernel
 
+# needed for gcc-10 support
+echo "~sys-block/open-iscsi-2.1.4 ~${ARCH}" >> /etc/portage/package.accept_keywords/open-iscsi
+echo "~sys-block/open-isns-0.101 ~${ARCH}" >> /etc/portage/package.accept_keywords/open-iscsi
+
 # musl only valid for amd64 for now
 if [[ "${GENTOO_PROFILE}" == *"musl"* ]]; then
     echo "dev-vcs/git -gpg" >> /etc/portage/package.use/musl  # gpg doesn't build on musl profiles
     echo "sys-libs/pam cracklib" >> /etc/portage/package.use/musl
-    echo "~sys-block/open-iscsi-2.1.1 ~${ARCH}" >> /etc/portage/package.accept_keywords/musl
-    echo "~sys-block/open-isns-0.100 ~${ARCH}" >> /etc/portage/package.accept_keywords/musl
 fi

diskimage_builder/elements/gentoo/pre-install.d/02-gentoo-04-install-desired-python

@@ -24,7 +24,7 @@ echo "PYTHON_TARGETS=\"${GENTOO_PYTHON_TARGETS}\"" >> /etc/portage/make.conf
 # install portage first due to bug in env vars not being passed when portage installs itself and re-inits
 emerge ${GENTOO_EMERGE_DEFAULT_OPTS} --update --newuse --deep sys-apps/portage
 # set the active python version
-emerge ${GENTOO_EMERGE_DEFAULT_OPTS} --oneshot --update --newuse --nodeps dev-lang/python-exec python-exec-conf
+emerge ${GENTOO_EMERGE_DEFAULT_OPTS} --oneshot --update --newuse --nodeps dev-lang/python-exec dev-lang/python-exec-conf
 echo yes | etc-update --automode -3 /etc/python-exec/python-exec.conf
 
 # make world consistant