biology/libcombine: Fix build with libsbml 5.20.0

===>  Configuring for libcombine-0.2.20
===>  Performing out-of-source build
/bin/mkdir -p /wrkdirs/usr/ports/biology/libcombine/work/.build
-- The CXX compiler identification is Clang 13.0.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/local/libexec/ccache/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Check for working CXX compiler: /usr/local/libexec/ccache/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Looking for BZ2_bzCompressInit in /usr/lib/libbz2.so
-- Looking for BZ2_bzCompressInit in /usr/lib/libbz2.so - found
-- Could NOT find PkgConfig (missing: PKG_CONFIG_EXECUTABLE)
CMake Error at /usr/local/share/cmake/Modules/Internal/CheckSourceCompiles.cmake:51 (message):
  check_source_compiles: C: needs to be enabled before use.
Call Stack (most recent call first):
  /usr/local/share/cmake/Modules/CheckCSourceCompiles.cmake:76 (cmake_check_source_compiles)
  CMakeModules/FindLIBXML.cmake:115 (CHECK_C_SOURCE_COMPILES)
  /usr/local/share/cmake/Modules/CMakeFindDependencyMacro.cmake:76 (find_package)
  /usr/local/lib/cmake/sbml-static-config.cmake:14 (find_dependency)
  CMakeModules/FindLIBSBML.cmake:42 (find_package)
  CMakeLists.txt:308 (find_package)

-- LIBXML_LIBXML_TEST =
CMake Error at /usr/local/share/cmake/Modules/Internal/CheckSourceCompiles.cmake:51 (message):
  check_source_compiles: C: needs to be enabled before use.
Call Stack (most recent call first):
  /usr/local/share/cmake/Modules/CheckCSourceCompiles.cmake:76 (cmake_check_source_compiles)
  CMakeModules/FindLIBXML.cmake:125 (CHECK_C_SOURCE_COMPILES)
  /usr/local/share/cmake/Modules/CMakeFindDependencyMacro.cmake:76 (find_package)
  /usr/local/lib/cmake/sbml-static-config.cmake:14 (find_dependency)
  CMakeModules/FindLIBSBML.cmake:42 (find_package)
  CMakeLists.txt:308 (find_package)

-- LIBXML_LIBXML_TEST2 =
CMake Error at CMakeModules/FindLIBXML.cmake:132 (message):
  Unable to compile a test executable against LIBXML

      LIBXML_INCLUDE_DIR = /usr/local/include/libxml2
      LIBXML_LIBRARY     = /usr/local/lib/libxml2.so

Call Stack (most recent call first):
  /usr/local/share/cmake/Modules/CMakeFindDependencyMacro.cmake:76 (find_package)
  /usr/local/lib/cmake/sbml-static-config.cmake:14 (find_dependency)
  CMakeModules/FindLIBSBML.cmake:42 (find_package)
  CMakeLists.txt:308 (find_package)

-- Configuring incomplete, errors occurred!
*** Error code 1

Stop.

biology/libcombine/files/patch-CMakeLists.txt

@@ -0,0 +1,11 @@
+--- CMakeLists.txt.orig	2022-12-07 09:35:06 UTC
++++ CMakeLists.txt
+@@ -44,7 +44,7 @@ set(LIBCOMBINE_VERSION "${LIBCOMBINE_VERSION_MAJOR}.${
+ set(PACKAGE_NAME "libCombine")
+ 
+ project(libCombine VERSION "${LIBCOMBINE_VERSION_MAJOR}.${LIBCOMBINE_VERSION_MINOR}.${LIBCOMBINE_VERSION_PATCH}"
+-                   LANGUAGES CXX)
++                   LANGUAGES C CXX)
+ 
+ set(CMAKE_CXX_STANDARD 11)
+ set(CMAKE_CXX_STANDARD_REQUIRED ON)