test: Fix valgrind execution
test: Fix valgrind execution

We need to invoke valgrind inside of the bash wrapper instead of outside

Change-Id: Ibc5ee18d88aa697c43a232cff90ee1c989ab36ef
Signed-off-by: William A. Kennington III <30fff5198f4d10ca1117e5f3ec82f3b4b8900d81@google.com>

openbmc/phosphor-networkd,openbmc/phosphor-networkd