Adding support for msys.
diff --git a/grpc.gemspec b/grpc.gemspec
index b8cfc4e..3e0677e 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -128,6 +128,7 @@
s.files += %w( src/core/lib/support/stack_lockfree.c )
s.files += %w( src/core/lib/support/string.c )
s.files += %w( src/core/lib/support/string_posix.c )
+ s.files += %w( src/core/lib/support/string_util_win32.c )
s.files += %w( src/core/lib/support/string_win32.c )
s.files += %w( src/core/lib/support/subprocess_posix.c )
s.files += %w( src/core/lib/support/subprocess_windows.c )
@@ -142,6 +143,7 @@
s.files += %w( src/core/lib/support/time_precise.c )
s.files += %w( src/core/lib/support/time_win32.c )
s.files += %w( src/core/lib/support/tls_pthread.c )
+ s.files += %w( src/core/lib/support/tmpfile_msys.c )
s.files += %w( src/core/lib/support/tmpfile_posix.c )
s.files += %w( src/core/lib/support/tmpfile_win32.c )
s.files += %w( src/core/lib/support/wrap_memcpy.c )