Currently, configure does not find the correct platform triplet for musl
as the default build/host values passed by OpenWrt buildroot does not
contain the text "linux-musl".
This backports
c163d7f0b6
to add detection for mips soft float and musl.
Signed-off-by: Jeffery To <jeffery.to@gmail.com>
(cherry picked from commit 5a0055df06)
