Fix minor typo of return value
Fix minor typo of return value

Return value of ManifestParser::ParseEdge shoule be boolean
maruel/ninja,bradking/ninja,bradking/ninja,Qix-/ninja,AoD314/ninja,maruel/ninja,ninja-build/ninja,maruel/ninja,sgraham/ninja,AoD314/ninja,ninja-build/ninja,bradking/ninja,iwadon/ninja,ninja-build/ninja,sgraham/ninja,bradking/ninja,iwadon/ninja,AoD314/ninja,AoD314/ninja,Qix-/ninja,iwadon/ninja,sgraham/ninja,ninja-build/ninja,Qix-/ninja,sgraham/ninja,iwadon/ninja,maruel/ninja,Qix-/ninja