[PATCH] Fix bug with character enumeration literal

[Tom Tromey]

>>>>> "Tom" == Tom Tromey <tromey@adacore.com> writes:

Tom> gdb/ChangeLog
Tom> 2019-08-07  Tom Tromey  <tromey@adacore.com>

Tom> 	* ada-exp.y (convert_char_literal): Handle "Q%c" encoding.
Tom> 	* ada-lang.c (ada_enum_name): Likewise.

I'm checking this in now.

Tom