add a "gsettings-backend" extension point to GIO
add a "gsettings-backend" extension point to GIO

cosimoc/glib,MathieuDuponchelle/glib,krichter722/glib,pstglia/external-bluetooth-glib,cention-sany/glib,darren-clark/android_platform_external_bluetooth_glib,tamaskenez/glib,krichter722/glib,tamaskenez/glib,djdeath/glib,lukasz-skalski/glib,gale320/glib,iConsole/Console-OS_external_bluetooth_glib,cention-sany/glib,MathieuDuponchelle/glib,endlessm/glib,ahmedammar/platform_external_gst_glib,bluez-android/glib,dicer/android_external_glib,gale320/glib,bluez-android/glib,tchakabam/glib,ieei/glib,johne53/MB3Glib,zsx/glib,endlessm/glib,ieei/glib-old-android,gale320/glib,01org/android-bluez-glib,gale320/glib,01org/android-bluez-glib,OpenInkpot-archive/iplinux-glib2.0,Distrotech/glib,bluez-android/glib,johne53/MB3Glib,antono/glib,bratsche/glib,krichter722/glib,pstglia/platform-external-bluetooth-glib,pstglia/platform-external-bluetooth-glib,cention-sany/glib,iConsole/Console-OS_external_bluetooth_glib,darren-clark/android_platform_external_bluetooth_glib,justinkb/aosp-bluez.glib,mzabaluev/glib,johne53/MB3Glib,MathieuDuponchelle/glib,mzabaluev/glib,antono/glib,lukasz-skalski/glib,tamaskenez/glib,OpenInkpot-archive/iplinux-glib2.0,justinkb/aosp-bluez.glib,tamaskenez/glib,tchakabam/glib,justinkb/aosp-bluez.glib,tchakabam/glib,cosimoc/glib,zsx/glib,iConsole/Console-OS_external_bluetooth_glib,ahmedammar/platform_external_gst_glib,bratsche/glib,justinkb/aosp-bluez.glib,cention-sany/glib,bratsche/glib,darren-clark/android_platform_external_bluetooth_glib,cention-sany/glib,pstglia/platform-external-bluetooth-glib,pstglia/external-bluetooth-glib,cosimoc/glib,tchakabam/glib,ieei/glib-old-android,cosimoc/glib,MathieuDuponchelle/glib,lukasz-skalski/glib,OpenInkpot-archive/iplinux-glib2.0,dicer/android_external_glib,ieei/glib,Distrotech/glib,mzabaluev/glib,tamaskenez/glib,Distrotech/glib,lukasz-skalski/glib,zsx/glib,djdeath/glib,bratsche/glib,ieei/glib-old-android,OpenInkpot-archive/iplinux-glib2.0,01org/android-bluez-glib,dicer/android_external_glib,ahmedammar/platform_external_gst_glib,ieei/glib,djdeath/glib,antono/glib,johne53/MB3Glib,ieei/glib-old-android,lukasz-skalski/glib,Distrotech/glib,bluez-android/glib,zsx/glib,Distrotech/glib,tchakabam/glib,mzabaluev/glib,pstglia/platform-external-bluetooth-glib,krichter722/glib,antono/glib,johne53/MB3Glib,ieei/glib,endlessm/glib,pstglia/external-bluetooth-glib,djdeath/glib,bluez-android/glib,endlessm/glib,iConsole/Console-OS_external_bluetooth_glib,krichter722/glib,dicer/android_external_glib,darren-clark/android_platform_external_bluetooth_glib,justinkb/aosp-bluez.glib,ahmedammar/platform_external_gst_glib,iConsole/Console-OS_external_bluetooth_glib,cosimoc/glib,ieei/glib,johne53/MB3Glib,pstglia/external-bluetooth-glib,endlessm/glib,pstglia/platform-external-bluetooth-glib,01org/android-bluez-glib,darren-clark/android_platform_external_bluetooth_glib,MathieuDuponchelle/glib,01org/android-bluez-glib,mzabaluev/glib,pstglia/external-bluetooth-glib,djdeath/glib,gale320/glib,OpenInkpot-archive/iplinux-glib2.0,dicer/android_external_glib