WebAssembly compile stub

[iceiix]

Attempting to adapt glutin to compile (but not run) under the wasm32-unknown-unknown target

temporary for iceiix/stevenarella#92

[iceiix]

rust-windowing#1108 Use the shared_library dependency only on required platforms

[iceiix]

      Updating git repository `https://github.com/iceiix/glutin`
     Compiling winit v0.18.1
     Compiling glutin v0.19.0 (https://github.com/iceiix/glutin?branch=wasm_stub#903059f7)
  error: The platform you're compiling for is not supported by winit
    --> .cargo/registry/src/github.aaakk.us.kg-1ecc6299db9ec823/winit-0.18.1/src/platform/mod.rs:26:1
     |
  26 | compile_error!("The platform you're compiling for is not supported by winit");
     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  
  error: aborting due to previous error
  
  error: Could not compile `winit`.
  warning: build failed, waiting for other jobs to finish...
| error: build failed
Compiling your crate to WebAssembly
Caused by: Process exited with 

[iceiix]

glutin $ cargo build --target wasm32-unknown-unknown
   Compiling glutin v0.19.0 (glutin)
error[E0432]: unresolved import `self::platform`
 --> src/platform/mod.rs:1:15
  |
1 | pub use self::platform::*;
  |               ^^^^^^^^ could not find `platform` in `self`

error[E0432]: unresolved import `this_platform_is_not_supported`
  --> src/platform/mod.rs:40:5
   |
40 | use this_platform_is_not_supported;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `this_platform_is_not_supported` in the root

error[E0433]: failed to resolve: could not find `Context` in `platform`
  --> src/combined.rs:58:19
   |
58 |         platform::Context::new(wb, el, &pf_reqs, &gl_attr).map(
   |                   ^^^^^^^ could not find `Context` in `platform`

error[E0433]: failed to resolve: could not find `Context` in `platform`
  --> src/context.rs:64:19
   |
64 |         platform::Context::new_context(el, &pf_reqs, &gl_attr)
   |                   ^^^^^^^ could not find `Context` in `platform`

error[E0433]: failed to resolve: could not find `Context` in `platform`
  --> src/separated.rs:59:19
   |
59 |         platform::Context::new_separated(window, el, &pf_reqs, &gl_attr).map(
   |                   ^^^^^^^ could not find `Context` in `platform`

error[E0412]: cannot find type `Context` in module `platform`
  --> src/context.rs:26:35
   |
26 |     pub(crate) context: platform::Context,
   |                                   ^^^^^^^ not found in `platform`
help: possible candidate is found in another module, you can import it into scope
   |
1  | use context::Context;
   |

warning: unused import: `this_platform_is_not_supported`
  --> src/platform/mod.rs:40:5
   |
40 | use this_platform_is_not_supported;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: #[warn(unused_imports)] on by default

error: aborting due to 6 previous errors

Some errors occurred: E0412, E0432, E0433.
For more information about an error, try `rustc --explain E0412`.
error: Could not compile `glutin`.

[iceiix]

This now builds

[iceiix]

iceiix/stevenarella#115