MdeModulePkg/LogoDxe: Return error if HII Package not present

MdeModulePkg/LogoDxe: Return error if HII Package not present

https://bugzilla.tianocore.org/show_bug.cgi?id=554

Update LogoDxe module to print a DEBUG() message and exit
with an error instead of ASSERT_EFI_ERROR() if the HII
Image Package with the logo image is not present.

If a tool chain does not support generation of PE/COFF
resource sections, then this module can not produce the logo
from an HII Image Package.  XCODE5 is an example of a tool
chain that does not currently support generation of PE/COFF
resource sections.

Cc: Star Zeng <star.zeng@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Andrew Fish <afish@apple.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Michael Kinney <michael.d.kinney@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>