example project file: https://github.com/truebit/webkit/raw/master/Source/WebKit2/WebKit2.xcodeproj/project.pbxproj
After xUniqued, only All PBXShellScriptBuildPhases got only one MD5 digest

Cause: buildPhases in PBX*Target could contains more than one PBXShellScriptBuildPhase