Use -D_GNU_SOURCE for Zynq builds
Use -D_GNU_SOURCE for Zynq builds

Appears to be necessary for compatibility with the Xilinx libc, which defines
fscanf but not __isoc99_fscanf.

uwsampa/accept,jck/accept,uwsampa/accept,jck/accept,uwsampa/accept,uwsampa/accept,jck/accept,jck/accept