ding-libs: new package

[Thomas:
 - Remove unneeded comment in Config.in
 - Remove select if libiconv, not needed
 - Add dependency on wchar, needed when we depend on gettext
 - Improve Config.in help text
 - Fix the format of the hash file to make it actually useful
 - Fix the comment header in the .mk file
 - Remove useless commented line in .mk file
 - Fixup license information: it's not under GPLv3, but under LGPLv3+
   (library) and GPLv3+ (test programs)
 - Add host-pkgconf to the dependencies, remove libiconv from the
   dependencies.
 - Add a comment to explain why autoreconf is needed.
 - Remove usage of $(MAKE1) that does look necessary.]

Signed-off-by: Gregory Dymarek <gregd72002@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>