additional FileProvider path to support external SD card (fix #7255)
additional FileProvider path to support external SD card (fix #7255)

tobiasge/cgeo,Bananeweizen/cgeo,matej116/cgeo,cgeo/cgeo,rsudev/c-geo-opensource,tobiasge/cgeo,rsudev/c-geo-opensource,auricgoldfinger/cgeo,S-Bartfast/cgeo,S-Bartfast/cgeo,Bananeweizen/cgeo,matej116/cgeo,cgeo/cgeo,rsudev/c-geo-opensource,cgeo/cgeo,Bananeweizen/cgeo,auricgoldfinger/cgeo,S-Bartfast/cgeo,cgeo/cgeo,auricgoldfinger/cgeo,tobiasge/cgeo,matej116/cgeo