Auto merge of #43117 - MJDSys:fix_rustbuild_libdir_2, r=alexcrichton

Fix stage 2 builds with a custom libdir.

When copying libstd for the stage 2 compiler, the builder ignores the
configured libdir/libdir_relative configuration parameters.  This causes
the compiler to fail to find libstd, which cause any tools built with the
stage 2 compiler to fail.

To fix this, make the copy steps of rustbuild aware of the libdir_relative
parameter when the stage >= 2.  Also update the dist target to be aware of
the new location of libstd.

0 files changed, 0 insertions, 0 deletions