Update windows bindings and use windows-targets (rust-lang#653)

This synchronizes the API definitions with std. Trouble is,
std uses its own definition of the `windows_targets::link!` macro
so I've used a path hack to include it in this crate when used as
a dependency of std. Otherwise the `windows-targets` crate is used.

Cargo.toml

@@ -38,6 +38,9 @@ cpp_demangle = { default-features = false, version = "0.4.0", optional = true, f
   "alloc",
 ] }
 
+[target.'cfg(windows)'.dependencies]
+windows-targets = "0.52.6"
+
 [target.'cfg(not(all(windows, target_env = "msvc", not(target_vendor = "uwp"))))'.dependencies]
 miniz_oxide = { version = "0.8", default-features = false }
 addr2line = { version = "0.24.0", default-features = false }

bindings.txt

@@ -1,5 +1,5 @@
 --out src/windows_sys.rs
---config std flatten
+--config sys flatten
 --filter
 Windows.Win32.Foundation.CloseHandle
 Windows.Win32.Foundation.FALSE

crates/as-if-std/Cargo.toml

@@ -26,9 +26,8 @@ default-features = false
 optional = true
 features = ['read_core', 'elf', 'macho', 'pe', 'xcoff', 'unaligned', 'archive']
 
-[build-dependencies]
-# Dependency of the `backtrace` crate
-windows-bindgen = "0.56"
+[target.'cfg(windows)'.dependencies]
+windows-targets = "0.52.6"
 
 [features]
 default = ['backtrace']