Repace use of static_nobundle with native_link_modifiers

This fixes warning when building Rust and running tests:
```
warning: library kind `static-nobundle` has been superseded by specifying `-bundle` on library kind `static`. Try `static:-bundle`
warning: `rustc_llvm` (lib) generated 2 warnings (1 duplicate)
```

compiler/rustc_llvm/build.rs

@@ -288,7 +288,7 @@ fn main() {
             let path = PathBuf::from(s);
             println!("cargo:rustc-link-search=native={}", path.parent().unwrap().display());
             if target.contains("windows") {
-                println!("cargo:rustc-link-lib=static-nobundle={}", stdcppname);
+                println!("cargo:rustc-link-lib=static:-bundle={}", stdcppname);
             } else {
                 println!("cargo:rustc-link-lib=static={}", stdcppname);
             }
@@ -302,6 +302,6 @@ fn main() {
     // Libstdc++ depends on pthread which Rust doesn't link on MinGW
     // since nothing else requires it.
     if target.contains("windows-gnu") {
-        println!("cargo:rustc-link-lib=static-nobundle=pthread");
+        println!("cargo:rustc-link-lib=static:-bundle=pthread");
     }
 }

compiler/rustc_llvm/src/lib.rs

@@ -1,5 +1,5 @@
 #![feature(nll)]
-#![feature(static_nobundle)]
+#![feature(native_link_modifiers)]
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 
 // NOTE: This crate only exists to allow linking on mingw targets.

library/unwind/src/lib.rs

@@ -5,7 +5,6 @@
 #![feature(native_link_modifiers_bundle)]
 #![feature(nll)]
 #![feature(staged_api)]
-#![feature(static_nobundle)]
 #![feature(c_unwind)]
 #![cfg_attr(not(target_env = "msvc"), feature(libc))]
 

src/test/run-make-fulldeps/foreign-exceptions/foo.rs

@@ -3,7 +3,7 @@
 // C++ code.
 
 // For linking libstdc++ on MinGW
-#![cfg_attr(all(windows, target_env = "gnu"), feature(static_nobundle))]
+#![cfg_attr(all(windows, target_env = "gnu"), feature(native_link_modifiers))]
 #![feature(c_unwind)]
 
 use std::panic::{catch_unwind, AssertUnwindSafe};

src/test/run-make-fulldeps/tools.mk

@@ -120,7 +120,7 @@ else
 	# So we end up with the following hack: we link use static-nobundle to only
 	# link the parts of libstdc++ that we actually use, which doesn't include
 	# the dependency on the pthreads DLL.
-	EXTRARSCXXFLAGS := -l static-nobundle=stdc++
+	EXTRARSCXXFLAGS := -l static:-bundle=stdc++
 endif
 else
 ifeq ($(UNAME),Darwin)

src/test/run-make/issue-36710/foo.rs

@@ -1,7 +1,7 @@
 // Tests that linking to C++ code with global destructors works.
 
 // For linking libstdc++ on MinGW
-#![cfg_attr(all(windows, target_env = "gnu"), feature(static_nobundle))]
+#![cfg_attr(all(windows, target_env = "gnu"), feature(native_link_modifiers))]
 
 extern "C" {
     fn get() -> u32;