Allow one to specify a STANDARD_EXEC_PREFIX for GCC (but not BINUTILS) bits.
Allow one to specify a STANDARD_EXEC_PREFIX for GCC (but not BINUTILS) bits.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase