There is typo in the mkdir command path,
the correct one is $(TARGET_OUT)/$(l)/$(MESA_DRI_MODULE_REL_PATH)
The other issue is in 32bit builds, because lib64 does not exist there,
we can use TARGET_IS_64_BIT to refine the post install command.
Fixes: a3d98ca62f ("Android: use symlinks for driver loading")
Signed-off-by: Rob Herring <robh@kernel.org>