Ports: Update ffmpeg's patches to use git patches

Author: https://github.com/alimpfard
Commit: https://github.com/SerenityOS/serenity/commit/5da5c4d9fa
Pull-request: https://github.com/SerenityOS/serenity/pull/14055
Reviewed-by: https://github.com/danners
Reviewed-by: https://github.com/timschumi

Ports/ffmpeg/patches/0001-Assume-that-EDOM-exists.patch

@@ -1,3 +1,14 @@
+From d64d7a469a8524d2ea8121d10844ff73feef3b55 Mon Sep 17 00:00:00 2001
+From: Peter Ross <pross@xvid.org>
+Date: Tue, 1 Mar 2022 19:50:19 +1100
+Subject: [PATCH] Assume that EDOM exists
+
+Since errno values are not numeric constants on serenity, this won't
+work in cpp, assume that it exists.
+---
+ libavutil/error.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
 diff --git a/libavutil/error.h b/libavutil/error.h
 index 0d3269a..a54d80d 100644
 --- a/libavutil/error.h
@@ -11,3 +22,6 @@ index 0d3269a..a54d80d 100644
  #define AVERROR(e) (-(e))   ///< Returns a negative error code from a POSIX error code, to return from library functions.
  #define AVUNERROR(e) (-(e)) ///< Returns a POSIX error code from a library function error return value.
  #else
+-- 
+2.36.1
+

Ports/ffmpeg/patches/ReadMe.md

@@ -1,9 +1,9 @@
-# Patches for FFmpeg on SerenityOS
+# Patches for ffmpeg on SerenityOS
 
-## `errno-is-not-valid-during-cpp.patch`
+## `0001-Assume-that-EDOM-exists.patch`
 
-FFmpeg performs a preprocessor-time test on errno values. This test does
-not work on SerenityOS because our errno values are described by an
-enum, and therefore are only available at compile time.
+Assume that EDOM exists
+
+Since errno values are not numeric constants on serenity, this won't
+work in cpp, assume that it exists.
 
-The patch removes the preprocessor-time test.