rubygems.grpc: fix with gcc7

Changed files
+2 -1
pkgs
development
ruby-modules
gem-config
+2 -1
pkgs/development/ruby-modules/gem-config/default.nix
···
};
grpc = attrs: {
-
nativeBuildInputs = [ pkgconfig ];
+
nativeBuildInputs = [ pkgconfig ];
buildInputs = [ openssl ];
+
NIX_CFLAGS_COMPILE = [ "-Wno-error=stringop-overflow" "-Wno-error=implicit-fallthrough" ];
};
hitimes = attrs: {