gdbus-codegen: Add "Returns:" blurb for generated get_proxy_type()
gdbus-codegen: Add "Returns:" blurb for generated get_proxy_type()

This was forgotten.

Signed-off-by: David Zeuthen <16a4bae6a7afea1fdd75baca6404fe68f285db96@redhat.com>

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