adding cproc

regarding

compiler-benchmark/benchmark

Line 343 in 9399e96

# ld: error: unable to find library -l:crt1.o

When building cproc, you have to correctly specify your platform if it fails to detect.
In example ./configure --host=x86_64-linux-musl
tcc -dumpmachine incorrectly returns x86_64-pc-linux-gnu