update riscvOVPsim.ic for semihosting mode (#681)
update riscvOVPsim.ic for semihosting mode (#681)

Signed-off-by: Udi <790cd677b6a22a419ffcfe0eb4293d8866eb70c9@google.com>
lowRISC/ibex,AmbiML/ibex,lowRISC/ibex,lowRISC/ibex,AmbiML/ibex,lowRISC/ibex,AmbiML/ibex,AmbiML/ibex