gated-plugin and multiple-plugins tests fail on stage one

[ChrisDenton]

On x86_64-pc-windows-msvc the src/test/ui-fulldeps/gated-plugin.rs and ui-fulldeps/multiple-plugins.rs tests fail on stage 1 but succeed in stage 2.

Abbreviated error output:

---- [ui] src/test\ui-fulldeps\gated-plugin.rs stdout ----

--- stderr -------------------------------
error: LoadLibraryExW failed
  --> R:\rust\src/test\ui-fulldeps\gated-plugin.rs:3:11
   |
LL | #![plugin(empty_plugin)]
   |           ^^^^^^^^^^^^

error: aborting due to previous error
------------------------------------------

---- [ui] src/test\ui-fulldeps\multiple-plugins.rs stdout ----

--- stderr -------------------------------
error: LoadLibraryExW failed
  --> R:\rust\src/test\ui-fulldeps\multiple-plugins.rs:8:11
   |
LL | #![plugin(multiple_plugins_1)] //~ WARN use of deprecated attribute `plugin`
   |           ^^^^^^^^^^^^^^^^^^

error: aborting due to previous error
------------------------------------------

I guess one solution would be to make them stage 2 only?

[mati865]

FWIW they have been also failing on windows-gnu since forever when using stage 1 as well but never bothered to investigate it 😄