Fixes build error:
xmrig-6.17.0/src/crypto/astrobwt/sort_indices2.cpp:40:24: error: missing binary operator before token "("
#if __has_cpp_attribute(unlikely)
found with the buildroot toolchain
arm-none-linux-gnueabi-gcc (Sourcery CodeBench Lite 2014.05-29) 4.8.3 20140320 (prerelease)
Inspired by
https://reviews.llvm.org/rG91c32fd8c8fa395971a028f7091273fa2c8f44e6