python-grpcio: only modify the compiler arguments on the target build

The modification of the compiler flags causes issues with the native builds of the package:

src/core/lib/surface/lame_client.cc: In function ‘grpc_channel* grpc_lame_client_channel_create(const char*, grpc_status_code, const char*)’:
src/core/lib/surface/lame_client.cc:178:3: warning: ‘auto’ changes meaning in C++11; please remove it [-Wc++0x-compat]
    auto chand = reinterpret_cast<grpc_core::ChannelData *>(elem->channel_data);
    ^
src/core/lib/surface/lame_client.cc:178:8: error: ‘chand’ does not name a type
    auto chand = reinterpret_cast<grpc_core::ChannelData *>(elem->channel_data);

Signed-off-by: Derek Straka <derek@asterius.io>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

0 files changed, 0 insertions, 0 deletions