Firmware builds require paths to all the binutils; it is not enough to
use only cc, or even as/ld as in the case of tests/tcg/tricore.
Adjust the cross-compiler configurator to detect also ar, nm, objcopy,
ranlib and strip.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20220517092616.1272238-12-pbonzini@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20220527153603.887929-23-alex.bennee@linaro.org>