meta-zaius: Override checkstop monitor service env

Override the checkstop monitor service environment file in order to add
the keyboard key number for the Zaius checkstop GPIO pin.

Signed-off-by: Xo Wang <xow@google.com>
Change-Id: I52a3f54d9f10c82c7bffcdc7012c178d97e8124d
diff --git a/meta-zaius/recipes-phosphor/host/checkstop-monitor/obmc/gpio/checkstop b/meta-zaius/recipes-phosphor/host/checkstop-monitor/obmc/gpio/checkstop
new file mode 100644
index 0000000..23cd0a0
--- /dev/null
+++ b/meta-zaius/recipes-phosphor/host/checkstop-monitor/obmc/gpio/checkstop
@@ -0,0 +1,4 @@
+PATH=/dev/input/event0
+KEY=47
+POLARITY=1
+TARGET=obmc-host-crash@0.target