meta-facebook: reduce permissions on scripts

Scripts should be installed with 0755 permissions and not 0777,
otherwise non-root users can potentially modify or delete them.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I41270a2bb3fb940d8ca49ed6230545d98efb2fea
diff --git a/meta-facebook/recipes-phosphor/gpio/phosphor-gpio-monitor_%.bbappend b/meta-facebook/recipes-phosphor/gpio/phosphor-gpio-monitor_%.bbappend
index c3e43ea..294fa42 100644
--- a/meta-facebook/recipes-phosphor/gpio/phosphor-gpio-monitor_%.bbappend
+++ b/meta-facebook/recipes-phosphor/gpio/phosphor-gpio-monitor_%.bbappend
@@ -24,6 +24,6 @@
                     ${D}${systemd_system_unitdir}
 
     install -d ${D}${libexecdir}/phosphor-gpio-monitor
-    install -m 0777 ${WORKDIR}/ipmb-rescan-fru.sh ${D}${libexecdir}/phosphor-gpio-monitor/
+    install -m 0755 ${WORKDIR}/ipmb-rescan-fru.sh ${D}${libexecdir}/phosphor-gpio-monitor/
 }
 FILES:${PN} += "${systemd_system_unitdir}/obmc-ipmb-rescan-fru.service"