Allow the user to set `julia-args` for precompile execution#931

Drvi wants to merge 2 commits intoJuliaLang:masterJuliaLang/PackageCompiler.jl:masterfrom

Drvi:td-julia-args-for-precompileDrvi/PackageCompiler.jl:td-julia-args-for-precompileCopy head branch name to clipboard