Flatpak: Allow specifying the path to a destination repository
Flatpak: Allow specifying the path to a destination repository

This makes the Flatpak builds honor the $FLATPAK_REPO environment variable.
When it is defined, it will be used as the path to an OSTree repository where
the Flatpak application bundle will be committed to. This allows to place
multiple builds in the same repository (along other applications, even), which
can be published. For more details abuit using repositories for publishing,
check:

   http://flatpak.org/developer.html#Distributing_Applications

Note that setting $FLATPAK_REPO disables building a standalone .flatpak bundle
file.

rishii7/vscode,eamodio/vscode,KattMingMing/vscode,rishii7/vscode,hoovercj/vscode,the-ress/vscode,jchadwick/vscode,hungys/vscode,rishii7/vscode,microsoft/vscode,hungys/vscode,jchadwick/vscode,landonepps/vscode,zyml/vscode,cleidigh/vscode,radshit/vscode,zyml/vscode,Microsoft/vscode,hashhar/vscode,landonepps/vscode,zyml/vscode,KattMingMing/vscode,joaomoreno/vscode,hoovercj/vscode,KattMingMing/vscode,hashhar/vscode,Microsoft/vscode,microlv/vscode,hungys/vscode,cleidigh/vscode,veeramarni/vscode,stringham/vscode,jchadwick/vscode,0xmohit/vscode,landonepps/vscode,charlespierce/vscode,mjbvz/vscode,joaomoreno/vscode,joaomoreno/vscode,hoovercj/vscode,hashhar/vscode,mjbvz/vscode,matthewshirley/vscode,eamodio/vscode,hoovercj/vscode,zyml/vscode,jchadwick/vscode,Krzysztof-Cieslak/vscode,mjbvz/vscode,microsoft/vscode,cleidigh/vscode,landonepps/vscode,Microsoft/vscode,veeramarni/vscode,hungys/vscode,stringham/vscode,charlespierce/vscode,microlv/vscode,rishii7/vscode,hashhar/vscode,matthewshirley/vscode,Krzysztof-Cieslak/vscode,stringham/vscode,eamodio/vscode,veeramarni/vscode,mjbvz/vscode,Microsoft/vscode,cleidigh/vscode,eamodio/vscode,eamodio/vscode,stringham/vscode,microsoft/vscode,veeramarni/vscode,Krzysztof-Cieslak/vscode,hoovercj/vscode,mjbvz/vscode,hungys/vscode,landonepps/vscode,Krzysztof-Cieslak/vscode,zyml/vscode,charlespierce/vscode,matthewshirley/vscode,joaomoreno/vscode,radshit/vscode,hoovercj/vscode,rishii7/vscode,KattMingMing/vscode,radshit/vscode,0xmohit/vscode,0xmohit/vscode,cleidigh/vscode,KattMingMing/vscode,DustinCampbell/vscode,rishii7/vscode,matthewshirley/vscode,0xmohit/vscode,DustinCampbell/vscode,hoovercj/vscode,hungys/vscode,hashhar/vscode,mjbvz/vscode,Zalastax/vscode,mjbvz/vscode,eamodio/vscode,gagangupt16/vscode,stringham/vscode,Krzysztof-Cieslak/vscode,hashhar/vscode,hashhar/vscode,KattMingMing/vscode,radshit/vscode,charlespierce/vscode,charlespierce/vscode,Microsoft/vscode,Zalastax/vscode,gagangupt16/vscode,radshit/vscode,veeramarni/vscode,hashhar/vscode,cra0zy/VSCode,the-ress/vscode,stringham/vscode,eamodio/vscode,Microsoft/vscode,gagangupt16/vscode,microsoft/vscode,eamodio/vscode,DustinCampbell/vscode,charlespierce/vscode,KattMingMing/vscode,cleidigh/vscode,Microsoft/vscode,hoovercj/vscode,KattMingMing/vscode,mjbvz/vscode,KattMingMing/vscode,matthewshirley/vscode,matthewshirley/vscode,microlv/vscode,0xmohit/vscode,DustinCampbell/vscode,hoovercj/vscode,Krzysztof-Cieslak/vscode,mjbvz/vscode,Krzysztof-Cieslak/vscode,stringham/vscode,veeramarni/vscode,Microsoft/vscode,zyml/vscode,0xmohit/vscode,microsoft/vscode,charlespierce/vscode,radshit/vscode,gagangupt16/vscode,Krzysztof-Cieslak/vscode,Zalastax/vscode,the-ress/vscode,microlv/vscode,jchadwick/vscode,matthewshirley/vscode,Krzysztof-Cieslak/vscode,stringham/vscode,microlv/vscode,rishii7/vscode,cleidigh/vscode,charlespierce/vscode,DustinCampbell/vscode,stringham/vscode,stringham/vscode,joaomoreno/vscode,gagangupt16/vscode,the-ress/vscode,stringham/vscode,Microsoft/vscode,gagangupt16/vscode,eamodio/vscode,0xmohit/vscode,hungys/vscode,Microsoft/vscode,matthewshirley/vscode,gagangupt16/vscode,DustinCampbell/vscode,jchadwick/vscode,cleidigh/vscode,DustinCampbell/vscode,joaomoreno/vscode,hungys/vscode,Krzysztof-Cieslak/vscode,hashhar/vscode,cleidigh/vscode,zyml/vscode,matthewshirley/vscode,0xmohit/vscode,the-ress/vscode,gagangupt16/vscode,eamodio/vscode,landonepps/vscode,landonepps/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,microlv/vscode,joaomoreno/vscode,Zalastax/vscode,veeramarni/vscode,Zalastax/vscode,matthewshirley/vscode,0xmohit/vscode,0xmohit/vscode,hoovercj/vscode,the-ress/vscode,Zalastax/vscode,radshit/vscode,radshit/vscode,charlespierce/vscode,radshit/vscode,mjbvz/vscode,jchadwick/vscode,mjbvz/vscode,mjbvz/vscode,hashhar/vscode,radshit/vscode,hungys/vscode,gagangupt16/vscode,Microsoft/vscode,charlespierce/vscode,zyml/vscode,jchadwick/vscode,microlv/vscode,gagangupt16/vscode,joaomoreno/vscode,the-ress/vscode,microlv/vscode,veeramarni/vscode,veeramarni/vscode,hashhar/vscode,0xmohit/vscode,DustinCampbell/vscode,matthewshirley/vscode,charlespierce/vscode,microsoft/vscode,Microsoft/vscode,DustinCampbell/vscode,hungys/vscode,zyml/vscode,rishii7/vscode,0xmohit/vscode,Krzysztof-Cieslak/vscode,cleidigh/vscode,KattMingMing/vscode,gagangupt16/vscode,hashhar/vscode,DustinCampbell/vscode,landonepps/vscode,hashhar/vscode,jchadwick/vscode,jchadwick/vscode,hungys/vscode,Zalastax/vscode,0xmohit/vscode,KattMingMing/vscode,Zalastax/vscode,matthewshirley/vscode,Zalastax/vscode,microsoft/vscode,veeramarni/vscode,zyml/vscode,landonepps/vscode,hungys/vscode,microlv/vscode,stringham/vscode,the-ress/vscode,jchadwick/vscode,Zalastax/vscode,zyml/vscode,radshit/vscode,stringham/vscode,Microsoft/vscode,Zalastax/vscode,the-ress/vscode,cleidigh/vscode,jchadwick/vscode,matthewshirley/vscode,DustinCampbell/vscode,microlv/vscode,zyml/vscode,Zalastax/vscode,radshit/vscode,landonepps/vscode,hashhar/vscode,landonepps/vscode,zyml/vscode,hashhar/vscode,joaomoreno/vscode,joaomoreno/vscode,hungys/vscode,radshit/vscode,veeramarni/vscode,Krzysztof-Cieslak/vscode,hungys/vscode,jchadwick/vscode,Krzysztof-Cieslak/vscode,veeramarni/vscode,the-ress/vscode,mjbvz/vscode,microsoft/vscode,zyml/vscode,KattMingMing/vscode,jchadwick/vscode,cleidigh/vscode,zyml/vscode,cleidigh/vscode,joaomoreno/vscode,microsoft/vscode,hungys/vscode,rishii7/vscode,mjbvz/vscode,microsoft/vscode,microlv/vscode,hoovercj/vscode,eamodio/vscode,eamodio/vscode,mjbvz/vscode,microlv/vscode,Krzysztof-Cieslak/vscode,joaomoreno/vscode,gagangupt16/vscode,the-ress/vscode,microsoft/vscode,hungys/vscode,veeramarni/vscode,hashhar/vscode,matthewshirley/vscode,KattMingMing/vscode,hungys/vscode,DustinCampbell/vscode,rishii7/vscode,Microsoft/vscode,cleidigh/vscode,charlespierce/vscode,eamodio/vscode,veeramarni/vscode,Krzysztof-Cieslak/vscode,Microsoft/vscode,charlespierce/vscode,charlespierce/vscode,the-ress/vscode,the-ress/vscode,0xmohit/vscode,microlv/vscode,KattMingMing/vscode,radshit/vscode,gagangupt16/vscode,stringham/vscode,Zalastax/vscode,landonepps/vscode,DustinCampbell/vscode,DustinCampbell/vscode,Zalastax/vscode,landonepps/vscode,eamodio/vscode,landonepps/vscode,rishii7/vscode,joaomoreno/vscode,hoovercj/vscode,microsoft/vscode,0xmohit/vscode,DustinCampbell/vscode,mjbvz/vscode,gagangupt16/vscode,stringham/vscode,zyml/vscode,joaomoreno/vscode,stringham/vscode,KattMingMing/vscode,cleidigh/vscode,KattMingMing/vscode,0xmohit/vscode,rishii7/vscode,eamodio/vscode,veeramarni/vscode,landonepps/vscode,radshit/vscode,gagangupt16/vscode,charlespierce/vscode,the-ress/vscode,jchadwick/vscode,cleidigh/vscode,microsoft/vscode,0xmohit/vscode,microsoft/vscode,mjbvz/vscode,landonepps/vscode,Microsoft/vscode,hoovercj/vscode,jchadwick/vscode,rishii7/vscode,gagangupt16/vscode,landonepps/vscode,microlv/vscode,radshit/vscode,microsoft/vscode,veeramarni/vscode,hoovercj/vscode,eamodio/vscode,gagangupt16/vscode,charlespierce/vscode,hoovercj/vscode,Krzysztof-Cieslak/vscode,rishii7/vscode,cleidigh/vscode,rishii7/vscode,hashhar/vscode,zyml/vscode,DustinCampbell/vscode,charlespierce/vscode,rishii7/vscode,Zalastax/vscode,rishii7/vscode,microlv/vscode,Microsoft/vscode,microlv/vscode,joaomoreno/vscode,KattMingMing/vscode,joaomoreno/vscode,eamodio/vscode,microsoft/vscode,jchadwick/vscode,Zalastax/vscode,matthewshirley/vscode,veeramarni/vscode,Zalastax/vscode,joaomoreno/vscode,radshit/vscode,microlv/vscode,DustinCampbell/vscode,hoovercj/vscode,stringham/vscode,hoovercj/vscode,matthewshirley/vscode,the-ress/vscode,matthewshirley/vscode,the-ress/vscode