c9870c1542
make kernels was originally documented (in commit r295099) as the same as make universe -DJUST_BUILD_KERNELS. However, it used the UNIVERSE_TARGET=buildkernel which is subtly different in that it also builds the toolchains and doesn't build the LINT modules unless they happened to already exist in the tree. This unbreaks POLA and just builds the kernels, including LINT, now rather than all that other stuff as well. When the commit originally happened, the two just differed by the LINT bug. r335711 introduced the universe dependency on the toolchain that wasn't present before, which diverged the two further. This restores the original intent of r295099. Reviewed by: brooks, bdrewery, emaste (LGTM) MFC After: 3 days Differential Revision: https://reviews.freebsd.org/D24212
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