Suppressed MSVC pragmas in fpl which were causing broken build.
Suppressed MSVC pragmas in fpl which were causing broken build.

From https://critique.corp.google.com/#review/107414604

Change-Id: I9a32e11de365e6a9467507cdba09df40149f6902
Tested: mesh_pipeline builds fine on OSX.

google/fplbase,google/fplbase,google/fplbase,google/fplbase