gdbus-codegen: Quote substitution variables
gdbus-codegen: Quote substitution variables

Avoids failure if they contain spaces.

Commit message written by Colin Walters <walters@verbum.org>

https://bugzilla.gnome.org/show_bug.cgi?id=649775

01org/android-bluez-glib,ieei/glib,krichter722/glib,johne53/MB3Glib,justinkb/aosp-bluez.glib,pstglia/external-bluetooth-glib,ieei/glib,cosimoc/glib,cention-sany/glib,cosimoc/glib,djdeath/glib,gale320/glib,johne53/MB3Glib,antono/glib,djdeath/glib,endlessm/glib,bluez-android/glib,Distrotech/glib,mzabaluev/glib,johne53/MB3Glib,pstglia/platform-external-bluetooth-glib,iConsole/Console-OS_external_bluetooth_glib,iConsole/Console-OS_external_bluetooth_glib,pstglia/external-bluetooth-glib,lukasz-skalski/glib,01org/android-bluez-glib,pstglia/external-bluetooth-glib,krichter722/glib,01org/android-bluez-glib,pstglia/platform-external-bluetooth-glib,mzabaluev/glib,djdeath/glib,tamaskenez/glib,johne53/MB3Glib,01org/android-bluez-glib,iConsole/Console-OS_external_bluetooth_glib,tchakabam/glib,Distrotech/glib,krichter722/glib,antono/glib,Distrotech/glib,tamaskenez/glib,endlessm/glib,tchakabam/glib,johne53/MB3Glib,MathieuDuponchelle/glib,krichter722/glib,cention-sany/glib,johne53/MB3Glib,antono/glib,MathieuDuponchelle/glib,iConsole/Console-OS_external_bluetooth_glib,zsx/glib,Distrotech/glib,justinkb/aosp-bluez.glib,zsx/glib,ieei/glib,ieei/glib,gale320/glib,bluez-android/glib,lukasz-skalski/glib,gale320/glib,zsx/glib,pstglia/external-bluetooth-glib,djdeath/glib,justinkb/aosp-bluez.glib,gale320/glib,tamaskenez/glib,cention-sany/glib,darren-clark/android_platform_external_bluetooth_glib,bluez-android/glib,pstglia/platform-external-bluetooth-glib,djdeath/glib,krichter722/glib,iConsole/Console-OS_external_bluetooth_glib,cention-sany/glib,MathieuDuponchelle/glib,darren-clark/android_platform_external_bluetooth_glib,lukasz-skalski/glib,darren-clark/android_platform_external_bluetooth_glib,cention-sany/glib,lukasz-skalski/glib,Distrotech/glib,mzabaluev/glib,cosimoc/glib,tchakabam/glib,justinkb/aosp-bluez.glib,antono/glib,justinkb/aosp-bluez.glib,pstglia/external-bluetooth-glib,mzabaluev/glib,cosimoc/glib,bluez-android/glib,darren-clark/android_platform_external_bluetooth_glib,ieei/glib,bluez-android/glib,pstglia/platform-external-bluetooth-glib,01org/android-bluez-glib,MathieuDuponchelle/glib,endlessm/glib,mzabaluev/glib,cosimoc/glib,zsx/glib,pstglia/platform-external-bluetooth-glib,lukasz-skalski/glib,tchakabam/glib,endlessm/glib,tamaskenez/glib,tamaskenez/glib,gale320/glib,darren-clark/android_platform_external_bluetooth_glib,endlessm/glib,MathieuDuponchelle/glib,tchakabam/glib