NetworkPkg: Make HttpBootGetBootFile return EFI_BUFFER_TOO_SMALL
NetworkPkg: Make HttpBootGetBootFile return EFI_BUFFER_TOO_SMALL

Per the description of HttpBootGetBootFile, the function should return
EFI_BUFFER_TOO_SMALL if the given buffer is smaller than the remote image.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Gary Lin <a057d4b27e9e9055b973f54b519db54c22ed5ee8@suse.com>
Reviewed-by: Fu Siyuan <eef549df2036636f79f66102b4e2dc444721df8f@intel.com>

MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2