[PATCH] ada: Use Is_Package_Or_Generic_Package whenever possible

[Robert Dewar]

Samuel Tardieu wrote:
> Use the synthesized check present in Einfo instead of repeating it
> in the code.

Nice cleanup, definitely OK to install

BTW, I had trouble applying this patch, lots of lines got folded
don't know whose mailer this is, perhaps yours Sam, because I
could not get any mailer I tried to see unfolded lines???