Building matmul single-core with trace enabled leads to intermittent failures

[jackl-xilinx]

Building and running the matrix multiplication design with trace enabled and running it will lead to inconsistent behavior where multiple run will sometimes pass and sometimes fail. This doesn't seem to happen in the non-trace option and seems to be true whether peano or chess is used as the compiler. You can test this via:

cd programming_examples/basic/matrix_multiplication/single_core
make trace

or
make -f Makefile.chess trace

Call the above multiple times (as it only builds it once) to see if pass or fail (and only generate a trace.txt when it passes)