meta-phosphor: remove exe perms from udev rules

Remove execute permssions from udev rules to avoid errors like:

systemd-udevd[110]: Configuration file /lib/udev/rules.d/70-iio.rules is
marked executable. Please remove executable permission bits. Proceeding
anyway.

(From meta-phosphor rev: d0c97c05b3c9b0d4b73978894b87cf649944bb37)

Change-Id: Ie2908b5b0734e79cf4d0287d1fe7262022d5d740
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-phosphor/recipes-phosphor/leds/phosphor-led-sysfs_git.bb b/meta-phosphor/recipes-phosphor/leds/phosphor-led-sysfs_git.bb
index dfacbb7..052aa85 100644
--- a/meta-phosphor/recipes-phosphor/leds/phosphor-led-sysfs_git.bb
+++ b/meta-phosphor/recipes-phosphor/leds/phosphor-led-sysfs_git.bb
@@ -24,5 +24,5 @@
 
 do_install_append() {
         install -d ${D}/${base_libdir}/udev/rules.d/
-        install ${WORKDIR}/70-leds.rules ${D}/${base_libdir}/udev/rules.d/
+        install -m 0644 ${WORKDIR}/70-leds.rules ${D}/${base_libdir}/udev/rules.d/
 }