example: better default path for Index.h
example: better default path for Index.h

JuliaPackageMirrors/Clang.jl,zhmz90/Clang.jl,mdcfrancis/Clang.jl,JuliaPackageMirrors/Clang.jl,zhmz90/Clang.jl,ihnorton/Clang.jl,mdcfrancis/Clang.jl,ihnorton/Clang.jl