util: Add description.md to each util

Descriptions are taken from the files themselves or READMEs. Description
followed by a space with the language in marked up as code.

Change-Id: I5f91e85d1034736289aedf27de00df00db3ff19c
Signed-off-by: Tom Hiller <thrilleratplay@gmail.com>
Reviewed-on: https://review.coreboot.org/27563
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

util/ipqheader/description.md

@@ -0,0 +1,8 @@
+__ipqheader__
+  * _createxbl.py_ - Concatentates XBL segments into one ELF image
+                    `Python`
+  * _ipqheader.py_ - Returns a packed MBN header image with the
+                     specified base and size `Python`
+  * _mbncat.py_ - Generate ipq8064 uber SBL `Python`
+  * *mbn_tools.py* - Contains all MBN Utilities for image generation
+                     `Python`