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/scripts/description.md

@@ -0,0 +1,25 @@
+__scripts__
+  * _config_ - Manipulate options in a .config file from the command
+              line `Bash`
+  * _cross-repo-cherrypick_ - Pull in patches from another tree from a
+                              gerrit repository. `Shell`
+  * _dts-to-fmd.sh_ -Converts a depthcharge fmap.dts into an fmaptool
+                     compatible .fmd format `Bash`
+  * _find-unused-kconfig-symbols.sh_ - Points out Kconfig variables
+                                       that may be unused. There are
+                                       some false positives, but it
+                                       serves as a starting point
+                                       `Shell`
+  * _gerrit-rebase_ - Applies all commits that from-branch has over
+                      to-branch, based on a common ancestor and gerrit
+                      meta-data `Bash`
+  * _get_maintainer.pl_ - Print selected MAINTAINERS information for
+                          the files modified in a patch or for a file
+                          `Perl`
+  * _maintainers.go_ - Build subsystem Maintainers `Go`
+  * _no-fsf-addresses.sh_ - Removes various FSF addresses from license
+                            headers `Shell`
+  * _parse-maintainers.pl_ - Script to alphabetize MAINTAINERS file
+                             `Perl`
+  * _ucode_h_to_bin.sh_ - Microcode conversion tool `Bash`
+  * _update_submodules_ - Check all submodules for updates `Bash`