EmulatorPkg: Disable TftpDynamicCommand and LogoDxe for XCODE5

EmulatorPkg: Disable TftpDynamicCommand and LogoDxe for XCODE5

Disable TftpDynamicCommand for XCODE5 because this command
places HII content in an PE/COFF resource section that is not
supported by the XCODE5 tool chain, and the missing HII
content causes the load of this command to ASSERT().

Disable the LogoDxe module that places the logo bitmap in
a PE/COFF resource section that is not supported by the
XCODE5 tool chain, and the missing HII content causes
the load of this module to ASSERT().

Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Signed-off-by: Andrew Fish <afish@apple.com>
Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>
Acked-by: Jordan Justen <jordan.l.justen@intel.com>
Tested-by: Andrew Fish <afish@apple.com>