meta-hpe: Fix permissions on systemd service file

systemd will complain if service files are executable. This
generates a warning on every boot. The fix is to drop the
execute bit.

Here is the error that this remediates:
systemd[1]: Configuration file /usr/lib/systemd/system/start-ipkvm.service
is marked executable. Please remove executable permission bits.
Proceeding anyway.

Change-Id: I4ad9847aa6456823c5b34a18d26de2b3750ec262
Signed-off-by: Matt Fischer <matthew.fischer@hpe.com>
diff --git a/meta-hpe/meta-common/recipes-phosphor/recipes-graphics/obmc-ikvm_git.bbappend b/meta-hpe/meta-common/recipes-phosphor/recipes-graphics/obmc-ikvm_git.bbappend
index 25fd08e..97d4ca3 100644
--- a/meta-hpe/meta-common/recipes-phosphor/recipes-graphics/obmc-ikvm_git.bbappend
+++ b/meta-hpe/meta-common/recipes-phosphor/recipes-graphics/obmc-ikvm_git.bbappend
@@ -8,6 +8,6 @@
 "
 
 do_install:append () {
-    install -D -m 0755 ${WORKDIR}/start-ipkvm.service ${D}${systemd_system_unitdir}
+    install -D -m 0644 ${WORKDIR}/start-ipkvm.service ${D}${systemd_system_unitdir}
     install -D -m 0755 ${WORKDIR}/create_usbhid.sh ${D}${bindir}
-}
\ No newline at end of file
+}