gdb/remote: replace use of std::pair with an actual struct

Commit:

  commit 5edcbe2277db05b77ebf53f9c30b6c889a8729bc
  Date:   Mon Jul 24 17:35:54 2023 +0100

      gdb: detect when gdbserver has no default executable set

Introduced a use of std::pair as a data structure to hold some per
program space information within the program space registry.

It was pointed out during review of a later patch[1][2] that the code
would be easier to understand if the std::pair was replaced with a
struct with named fields.

That is what this commit does.  Replace the std::pair with a struct,
and update all accesses to use the named fields.

There should be no user visible changes after this commit.

[1] https://inbox.sourceware.org/gdb-patches/69681489-d556-4496-9e3b-8273cab3d8f5@simark.ca
[2] https://inbox.sourceware.org/gdb-patches/469655a7-2bcc-4f27-b2d7-3fa8808ca5b5@simark.ca

Approved-By: Simon Marchi <simon.marchi@efficios.com>

0 files changed, 0 insertions, 0 deletions