Revert "net-libs/rustls-ffi: drop nightly Rust flag"

This reverts commit 5f34085ace.

Closes: https://bugs.gentoo.org/928002
Signed-off-by: Sam James <sam@gentoo.org>

net-libs/rustls-ffi/files/rustls-ffi-0.12.1-no-rust-nightly.patch

@@ -1,48 +0,0 @@
-https://github.com/rustls/rustls-ffi/issues/397
-https://github.com/rustls/rustls-ffi/pull/398
-
-From 68b7153018647baec43ea950f28b2f84e87f5296 Mon Sep 17 00:00:00 2001
-From: Daniel McCarney <daniel@binaryparadox.net>
-Date: Wed, 27 Mar 2024 21:08:16 -0400
-Subject: [PATCH] Cargo: configure cargo-c to use vendored .h
-
-Presently we pre-generate the rustls.h header file using `cbindgen`,
-commit the result to `src/rustls.h`, and check that the generated result
-matches the checked-in result in CI.
-
-The new experimental cargo-c build regenerates its own header file using
-`cbindgen` by default unless told to do otherwise. We'd prefer it didn't
-do this because we're using a `cbindgen` feature that requires nightly
-rust.
-
-This commit updates the `Cargo.toml` capi metadata to tell cargo-c to
-skip generation of its own header file. We then configure the
-pre-generated checked-in header file as an asset to be copied into the
-install include directory.
-
-This better matches how the `Makefile` build allowed building the static
-lib without needing nightly rust or `cbindgen`.
----
- Cargo.toml | 4 ++++
- 1 file changed, 4 insertions(+)
-
-diff --git a/Cargo.toml b/Cargo.toml
-index 7a910a9d..4c2b2e94 100644
---- a/Cargo.toml
-+++ b/Cargo.toml
-@@ -41,6 +41,7 @@ regex = "1.9.6"
- [package.metadata.capi.header]
- name = "rustls"
- subdirectory = false
-+generation = false # Prefer a vendored .h
- 
- [package.metadata.capi.library]
- name = "rustls"
-@@ -50,3 +51,6 @@ rustflags = "-Cmetadata=rustls-ffi"
- [package.metadata.capi.pkg_config]
- name = "rustls"
- filename = "rustls"
-+
-+[package.metadata.capi.install]
-+asset = [{ from = "src/rustls.h", to = "include" }]
-

net-libs/rustls-ffi/rustls-ffi-0.12.1-r1.ebuild

@@ -56,10 +56,6 @@ BDEPEND="dev-util/cargo-c"
 
 QA_FLAGS_IGNORED="usr/lib.*/librustls.*"
 
-PATCHES=(
-	"${FILESDIR}"/rustls-ffi-0.12.1-no-rust-nightly.patch
-)
-
 src_prepare() {
 	default
 
@@ -74,6 +70,9 @@ src_configure() {
 	# Hopefully fixed with https://github.com/rustls/rustls-ffi/pull/389
 	export RUSTFLAGS="${RUSTFLAGS} -C link-arg=-Wl,-z,notext"
 
+	# https://github.com/rustls/rustls-ffi/issues/397
+	export RUSTC_BOOTSTRAP=1
+
 	multilib-minimal_src_configure
 }