rust: minor additions, no rebuild required if you don't have libgit2 installed

rust/.signature

@@ -1,6 +1,6 @@
 untrusted comment: verify with /etc/ports/opt.pub
-RWSE3ohX2g5d/VP1RzRresw/Nu41ftKGa+OzGthahOdY8YUvQetJO/jbvfApam4AET4yCS8htCuqNBYIj+xRxcpswUW2YqRDGAo=
-SHA256 (Pkgfile) = 0733ae22874f65c3f7be07455c8d80f786be51d79014c9f4e94714c1fac466e7
+RWSE3ohX2g5d/VmHuQhgzj2VIeTpmRSzR/LekqFWKvqP97fllm9w8MGYsPfRFu566W4mIe0IYIxZs4BESyIfXe+cdQNxTdkElA8=
+SHA256 (Pkgfile) = ac7de0e556a103cf0f6fcbbc3c254e6aa7027bf91568e08e9c541fa4a024f5ef
 SHA256 (.footprint) = 1a9358f2baa5b4536ce9c19aa01051ccd3d455b597d457c22945b4b55f640ee2
 SHA256 (rustc-1.55.0-src.tar.xz) = aec85a7c1f40b7a40818a58ae13632f8a12cfaa4d3e2a10957d0e9d16dfdd556
 SHA256 (rust-std-1.54.0-x86_64-unknown-linux-gnu.tar.xz) = a22e19859b3c5032daac1633637546a986c51bdfa3ad0db6e394e6cc461f466b

rust/Pkgfile

@@ -74,8 +74,10 @@ cat <<- EOF > $SRC/config.toml
 	# http://blog.llvm.org/2019/09/closing-gap-cross-language-lto-between.html
 	# https://github.com/rust-lang/rust/issues/54872
 	codegen-units-std = 1
-
 	debuginfo-level-std = 2
+	codegen-tests = false
+
+	description = "CRUX"
 	channel = "stable"
 	parallel-compiler = true
 	rpath = false
@@ -130,11 +132,12 @@ EOF
 	mkdir "$PKGMK_SOURCE_DIR/rust" || true
 	export CARGO_HOME="$PKGMK_SOURCE_DIR/rust"
 
-        if [ -e '/usr/bin/sccache' ]; then
-                export RUSTC_WRAPPER='/usr/bin/sccache'
-                export SCCACHE_IDLE_TIMEOUT='1500'
-        fi
+	if [ -e '/usr/bin/sccache' ]; then
+		export RUSTC_WRAPPER='/usr/bin/sccache'
+		export SCCACHE_IDLE_TIMEOUT='1500'
+	fi
 
+	export LIBGIT2_NO_PKG_CONFIG=1
 	export RUST_BACKTRACE=full
 	/usr/bin/python3 ./x.py build --config="${SRC}"/config.toml -j ${JOBS-1}
 	DESTDIR=$PKG /usr/bin/python3 ./x.py --config="${SRC}"/config.toml install