precompile Pkg in this depot

Author: IanButterworth

test/pkg.jl

@@ -367,6 +367,7 @@ temp_pkg_dir() do project_path
         tasks = Task[]
         iobs = IOBuffer[]
         Sys.CPU_THREADS == 1 && error("Cannot test for atomic usage log file interaction effectively with only Sys.CPU_THREADS=1")
+        run(pipeline(`$(Base.julia_cmd()) --project="$(pkgdir(Pkg))" -e "import Pkg"`)) # to precompile Pkg given we're in a different depot
         for i in 1:Sys.CPU_THREADS
             iob = IOBuffer()
             t = @async run(pipeline(`$(Base.julia_cmd()) --project="$(pkgdir(Pkg))"