Add recipe for libwinit (#6007)

* Add recipe for libwinit

* Fix typo

* Disable some platforms

Will hopefully enable a lot of these platforms back in future Rust versions
rust-lang/rust#61956

L/libwinit/build_tarballs.jl

@@ -0,0 +1,46 @@
+# Note that this script can accept some limited command-line arguments, run
+# `julia build_tarballs.jl --help` to see a usage message.
+using BinaryBuilder
+
+name = "libwinit"
+version = v"0.17.0"
+
+# Collection of sources required to complete build
+sources = [
+    ArchiveSource("https://github.com/feenkcom/libwinit/archive/refs/tags/v$(version).tar.gz",
+                  "dab68ccefaf496d5c3de751a15a0be54a3eb1ee2d4260105ec3343875c54f0e3"),
+    FileSource("https://github.com/feenkcom/libwinit/releases/download/v$(version)/winit.h", 
+               "d35910a1c54cf093f70e0cafddb72442f453635cc8147f1c61cb9d9b794da313"),
+]
+
+# Adapted from the justfile of the repo
+script = raw"""
+install -Dvm 0755 "winit.h" "${includedir}/winit.h"
+cd $WORKSPACE/srcdir/libwinit-*
+cargo build --release
+install_license LICENSE
+if [[ "${target}" == *-mingw* ]]; then
+    install -Dvm 0755 "target/${rust_target}/release/Winit.${dlext}" "${libdir}/libWinit.${dlext}"
+else
+    install -Dvm 0755 "target/${rust_target}/release/libWinit.${dlext}" "${libdir}/libWinit.${dlext}"
+fi
+"""
+
+# These are the platforms we will build for by default, unless further
+# platforms are passed in on the command line
+platforms = supported_platforms(; exclude=p -> (Sys.iswindows(p) && arch(p) == "i686") || (Sys.islinux(p) && (libc(p) == "musl" || arch(p) == "armv6l" || arch(p) == "armv7l" || arch(p) == "i686")) || Sys.isbsd(p))
+
+# The products that we will ensure are always built
+products = [
+    LibraryProduct("libWinit", :libWinit),
+    FileProduct("include/winit.h", :winit_h),
+]
+
+# Dependencies that must be installed before this package can be built
+dependencies = Dependency[
+    Dependency("libboxer_jll")
+]
+
+# Build the tarballs, and possibly a `build.jl` as well.
+build_tarballs(ARGS, name, version, sources, script, platforms, products, dependencies;
+               julia_compat="1.6", compilers=[:c, :rust])