main/gcc: add symlink for ${CTARGET}cc
bootstrap has been broken in alpine for several weeks due to a change
in the recipe for main/musl
to use ${CROSS_COMPILE}cc
instead of
${CROSS_COMPILE}gcc
. this works for compiling on the local machine,
but breaks during bootstrap because there is no matching symlink from
${CTARGET}-cc to ${CTARGET}-gcc. this adds that symlink, fixing bootstrap.