meta-quanta: meta-gbs: Cleanup for Yocto override syntax change

Cleanup with
```
convert-overrides.py meta-quanta/meta-gbs

git grep "_[a-z0-9_/-]*[ :]" -- meta-quanta/meta-gbs

git grep -l _gbs -- meta-quanta/meta-gbs \
  | xargs sed -i 's/_gbs/:gbs/'
```

After cleanup
```
$ git grep "_[a-z0-9_/-]*[ :]" -- meta-quanta/meta-gbs/ | grep '.bb'
meta-quanta/meta-gbs/recipes-bsp/images/npcm7xx-igps-native_%.bbappend:addtask do_gbs_prepare_xmls after do_patch before do_install
meta-quanta/meta-gbs/recipes-gbs/gbs-sysinit/gbs-sysinit.bb:do_install () {
meta-quanta/meta-gbs/recipes-google/acpi-power-state/acpi-power-state-daemon_%.bbappend:do_install:append:gbs() {
meta-quanta/meta-gbs/recipes-phosphor/fans/phosphor-pid-control_%.bbappend:do_install:append:gbs() {
meta-quanta/meta-gbs/recipes-phosphor/gpio/phosphor-gpio-monitor_%.bbappend:do_install:append:gbs() {
meta-quanta/meta-gbs/recipes-phosphor/interfaces/bmcweb_%.bbappend:do_install:append:gbs(){
meta-quanta/meta-gbs/recipes-phosphor/inventory/phosphor-inventory-manager_%.bbappend:do_install:append:gbs() {
meta-quanta/meta-gbs/recipes-phosphor/ipmi/phosphor-ipmi-blobs-binarystore_%.bbappend:do_install:append:gbs() {
meta-quanta/meta-gbs/recipes-phosphor/leds/phosphor-led-manager_%.bbappend:do_install:append:gbs() {
meta-quanta/meta-gbs/recipes-phosphor/sensors/phosphor-nvme_%.bbappend:do_install:append:gbs() {
meta-quanta/meta-gbs/recipes-phosphor/sensors/phosphor-virtual-sensor_%.bbappend:do_install:append:gbs() {
meta-quanta/meta-gbs/recipes-quanta/network/usb-network.bbappend:do_install:append:gbs() {
meta-quanta/meta-gbs/recipes-x86/chassis/x86-power-control_%.bbappend:do_install:append:gbs() {
```

Signed-off-by: Brandon Kim <brandonkim@google.com>
Change-Id: If640ddd3c6f6084bb0a1d82e2d18fa2640d9d83e
diff --git a/meta-quanta/meta-gbs/recipes-google/acpi-power-state/acpi-power-state-daemon_%.bbappend b/meta-quanta/meta-gbs/recipes-google/acpi-power-state/acpi-power-state-daemon_%.bbappend
index f833b55..0c20dc4 100644
--- a/meta-quanta/meta-gbs/recipes-google/acpi-power-state/acpi-power-state-daemon_%.bbappend
+++ b/meta-quanta/meta-gbs/recipes-google/acpi-power-state/acpi-power-state-daemon_%.bbappend
@@ -1,6 +1,6 @@
-FILESEXTRAPATHS_prepend_gbs := "${THISDIR}/${PN}:"
+FILESEXTRAPATHS:prepend:gbs := "${THISDIR}/${PN}:"
 
-SRC_URI_append_gbs = " \
+SRC_URI:append:gbs = " \
     file://gbs-host-s0-set-failsafe.service \
     file://gbs-host-s5-set-failsafe.service \
     file://gbs-host-set-boot-failsafe@.service \
@@ -11,11 +11,11 @@
     file://gbs-host-ready.target \
     "
 
-RDEPENDS_${PN}_append_gbs = "bash"
+RDEPENDS:${PN}:append:gbs = "bash"
 
 CHASSIS_INSTANCE="0"
 
-SYSTEMD_SERVICE_${PN}_append_gbs = " \
+SYSTEMD_SERVICE:${PN}:append:gbs = " \
     gbs-host-s0-set-failsafe.service \
     gbs-host-s5-set-failsafe.service \
     gbs-host-set-boot-failsafe@${CHASSIS_INSTANCE}.service \
@@ -23,11 +23,11 @@
     gbs-host-ready.target \
     "
 
-FILES_${PN}_append_gbs = " \
+FILES:${PN}:append:gbs = " \
     ${systemd_system_unitdir}/gbs-host-set-boot-failsafe@.service \
     "
 
-do_install_append_gbs() {
+do_install:append:gbs() {
     install -d ${D}${bindir}
 
     install -m 0755 ${WORKDIR}/gbs-set-failsafe.sh ${D}${bindir}/.