[grpc] Commit missed patch file.

ports/grpc/disable-csharp-ext.patch

@@ -0,0 +1,31 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index c85a20a..99b2897 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -3694,6 +3694,7 @@ target_link_libraries(qps
+ 
+ endif (gRPC_BUILD_TESTS)
+ 
++option(gRPC_INSTALL_CSHARP_EXT "" ON)
+ add_library(grpc_csharp_ext SHARED
+   src/csharp/ext/grpc_csharp_ext.c
+ )
+@@ -3702,7 +3703,7 @@ if(WIN32 AND MSVC)
+   set_target_properties(grpc_csharp_ext PROPERTIES COMPILE_PDB_NAME "grpc_csharp_ext"
+     COMPILE_PDB_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}"
+   )
+-  if (gRPC_INSTALL)
++  if (gRPC_INSTALL AND gRPC_INSTALL_CSHARP_EXT)
+     install(FILES ${CMAKE_CURRENT_BINARY_DIR}/grpc_csharp_ext.pdb
+       DESTINATION ${CMAKE_INSTALL_LIBDIR} OPTIONAL
+     )
+@@ -3728,8 +3729,7 @@ target_link_libraries(grpc_csharp_ext
+ )
+ 
+ 
+-
+-if (gRPC_INSTALL)
++if (gRPC_INSTALL AND gRPC_INSTALL_CSHARP_EXT)
+   install(TARGETS grpc_csharp_ext EXPORT gRPCTargets
+     RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+     LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}