Use DEPOT_PATH instead of HOME in cmdlineargs test

Author: vchuravy

test/cmdlineargs.jl

@@ -459,7 +459,7 @@ let exename = `$(Base.julia_cmd()) --startup-file=no`
         mkpath(joinpath(dir, ".julia", "config"))
         cp(testfile, joinpath(dir, ".julia", "config", "startup.jl"))
 
-        withenv((Sys.iswindows() ? "USERPROFILE" : "HOME") => dir) do
+        withenv("JULIA_DEPOT_PATH" => dir) do
             output = "[\"foo\", \"-bar\", \"--baz\"]"
             @test readchomp(`$exename $testfile foo -bar --baz`) == output
             @test readchomp(`$exename $testfile -- foo -bar --baz`) == output
@@ -501,7 +501,7 @@ let exename = `$(Base.julia_cmd()) --startup-file=no`
 
         readsplit(cmd) = split(readchomp(cmd), '\n')
 
-        withenv((Sys.iswindows() ? "USERPROFILE" : "HOME") => dir) do
+        withenv("JULIA_DEPOT_PATH" => dir) do
             @test readsplit(`$exename $a`) ==
                 [a, a,
                  b, a]