GenFw: Use memmove for overlapping regions
GenFw: Use memmove for overlapping regions

The source & destination will likely overlap in these cases.
memcpy should not be used for overlapping memory regions.

git-svn-id: f3880c1fc5096ce2109c8aec392d8e07f619f417@2117 c2973edb-eda0-4c78-bc6a-9341b269661f

bitcrystal/buildtools-BaseTools,tianocore/buildtools-BaseTools,tianocore/buildtools-BaseTools,bitcrystal/buildtools-BaseTools,bitcrystal/buildtools-BaseTools,bitcrystal/buildtools-BaseTools,tianocore/buildtools-BaseTools,tianocore/buildtools-BaseTools,tianocore/buildtools-BaseTools,bitcrystal/buildtools-BaseTools