SDL_mixer: Added CMake support files to the distribution archive

From 85b00cf9343f8dd12d0ee6f6e6639a3988336e5d Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Thu, 16 Jun 2022 21:51:26 -0700
Subject: [PATCH] Added CMake support files to the distribution archive

---
 Makefile.in | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Makefile.in b/Makefile.in
index 618a82f5..52e70d9b 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -46,10 +46,14 @@ SRC_DIST =			\
 	.gitmodules		\
 	Android.mk		\
 	CMakeLists.txt		\
+	cmake
 	Makefile.in		\
 	Makefile.os2		\
 	SDL2_mixer.pc.in	\
 	SDL2_mixer.spec.in	\
+	SDL2_mixerConfig.cmake.in \
+	sdl2_mixer-config-version.cmake.in \
+	sdl2_mixer-config.cmake.in \
 	include/SDL_mixer.h	\
 	VisualC			\
 	VisualC-WinRT		\