Add Goldfish to soong name spaces of MGSI products

We need mk_combined_img in GF products to create mixed images.

Bug: 157212511
Test: $ lunch mgsi_arm-userdebug; m mk_combined_img
      $ lunch mgsi_arm64-userdebug; m mk_combined_img
      $ lunch mgsi_x86-userdebug; m mk_combined_img
      $ lunch mgsi_x86_64-userdebug; m mk_combined_img
Change-Id: I62cafb087f4c918a5469e5ad76ee18f9fde42d4e
Merged-In: I62cafb087f4c918a5469e5ad76ee18f9fde42d4e
(cherry picked from commit ce6013b8c1d4acc0d1437e1ee4c043ec56d7e790)
4 files changed