[commit]: Turn on initial Ada support

[Mark Kettenis]

Paul.

When compiling on sparc-sun-solaris2.9 (gcc 3.2.3, flex 2.5.4) I get:

/juw15_0/kettenis/sandbox/gdb/obj/gdb/../../src/gdb/ada-exp.y:636: warning: `string_to_operator' defined but not used
ada-lex.c:2529: warning: `yy_flex_realloc' defined but not used
ada-lex.c:2016: warning: `yyunput' defined but not used

Can you do something about that?  I'm using -Werror (as all GDB
developers really should) so this breaks the build.

Cheers,

Mark