The command line tool visdiff is sandboxed using .plist + .entitlements files
The plist file must be embedded into binary and before XCode 7 this was achieved adding to the linker OTHER_LDFLAGS (under "Other Linker Flags") the value
-sectcreate __TEXT __info_plist visdiff/Info.plist
but this 'overwrites' the expansion done by the compiler
Remove the linker flag and turn on the flag Build Settings -> Packaging -> Create info.plit Section in Binary