Matthias Fechner 721f51f965 Fixed patch. ...

It seems that Mk/Scripts/smart_makepatch.sh has problem to generate here a valid patch file.
So generated it manually with:
cd work/grpc-1.30.2
diff -udpa grpc.gemspec.orig grpc.gemspec

2021-03-08 11:44:54 +00:00

..

patch-grpc.gemspec

Fixed patch.

2021-03-08 11:44:54 +00:00

patch-src_ruby_ext_grpc_extconf.rb

…

patch-src_ruby_lib_grpc.rb

…