gn2bp: target.name does not include toolchain anymore

Clean up use of label_without_toolchain which is now mostly unnecessary.

I am not sure why the Android.bp.swp changed on me. Something to look
into.

Test: //components/cronet/android:cronet
Change-Id: Ic8ee9c8796872a7221c54e4093c6b35c2363bf89
2 files changed