swr: build swr with -fno-strict-aliasing
swr: build swr with -fno-strict-aliasing

swr rasterizer contains numerous data transfers between vectors
and ordinary C types.  Fixing for strict aliasing will take time.

Reviewed-by: Matt Turner <789b315743a28dd066a4ba1459c35951c291d8a6@gmail.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler