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3324de54c2
This avoids a flood of warnings when testing the armv7-unknown-linux-gnueabihf target. Under this target, we would pass -Ctarget-features=+neon when building intrinsic-test, but it is compiled for the host (and this tool doesn't need Neon even if the host _is_ Armv7). This also sets --target when running the 'hex' example, since that seems more appropriate than always building it for the host.