c/x86-cache_delay: reduce malloc size
c/x86-cache_delay: reduce malloc size

There is no need to allocate 4KB in this program, and musl-gcc on Ubuntu
14.04 seems to fails with "large" malloc allocations in "make test".

fishilico/shared,fishilico/shared,fishilico/shared,fishilico/shared,fishilico/shared,fishilico/shared,fishilico/shared