New package: riff-2.16.2

Fixes #36885

srcpkgs/riff/patches/doublebuild.patch

@@ -0,0 +1,14 @@
+Slight hack to prevent a rebuild in the install phase
+
+--
+
+--- a/Cargo.toml
++++ b/Cargo.toml
+@@ -19,6 +19,7 @@
+ bytecount = "0.6.2"
+ num_cpus = "1.13.0"
+ threadpool = "1.8.1"
++syn = {version = "1.0.48", features = ["full"]}
+
+ [dev-dependencies]
+ pretty_assertions = "0.6.1"

srcpkgs/riff/template

@@ -0,0 +1,15 @@
+# Template file for 'riff'
+pkgname=riff
+version=2.16.2
+revision=1
+build_style=cargo
+short_desc="Diff filter highlighting which line parts have changed"
+maintainer="0x5c <dev@0x5c.io>"
+license="MIT"
+homepage="https://github.com/walles/riff"
+distfiles="https://github.com/walles/riff/archive/refs/tags/${version}.tar.gz"
+checksum=788abf47f2ecb570a8e8815317322c31db3b9a7310a41f689c815e872b8bbcd4
+
+post_install() {
+	vlicense LICENSE
+}