package/mbw: fix build without C++

Fix the following build failure without C++ raised since the addition of
the package in commit e27ef76582:

CMake Error at CMakeLists.txt:3 (project):
  No CMAKE_CXX_COMPILER could be found.

  Tell CMake where to find the compiler by setting either the environment
  variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path
  to the compiler, or to the compiler name if it is in the PATH.

Fixes:
 - http://autobuild.buildroot.org/results/17e2d6e6d6ddf7845a37a8bbf733faf40d9faa61

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/mbw/0001-CMakeLists.txt-fix-build-without-C.patch

@@ -0,0 +1,38 @@
+From 059f67459912bba6d7f605b7c43519ff547f3a80 Mon Sep 17 00:00:00 2001
+From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+Date: Sun, 7 Aug 2022 11:34:19 +0200
+Subject: [PATCH] CMakeLists.txt: fix build without C++
+
+Fix the following build failure without C++:
+
+CMake Error at CMakeLists.txt:3 (project):
+  No CMAKE_CXX_COMPILER could be found.
+
+  Tell CMake where to find the compiler by setting either the environment
+  variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path
+  to the compiler, or to the compiler name if it is in the PATH.
+
+Fixes:
+ - http://autobuild.buildroot.org/results/17e2d6e6d6ddf7845a37a8bbf733faf40d9faa61
+
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+[Upstream status: https://github.com/raas/mbw/pull/14]
+---
+ CMakeLists.txt | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index d3d4fcd..3b2cb3e 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -1,6 +1,6 @@
+ cmake_minimum_required(VERSION 3.10)
+ 
+-project(mbw VERSION 1.5)
++project(mbw VERSION 1.5 LANGUAGES C)
+ 
+ add_executable(mbw mbw.c)
+ install(TARGETS mbw DESTINATION bin)
+-- 
+2.35.1
+