[PATCH v3 7/7] gdb/testsuite: add macros test for source files compiled in various ways

[Simon Marchi]

>> +# Based on `gcc -gdwarf-5 -g3 <file>`, gcc 11 paired with gas from binutils 2.38.
>
> This comment wasn't really clear to me. Maybe something like "The
> following calls are based on ..." or something to make clear that this
> comment refers to a group of do_test calls below, would avoid possible
> confusion.

Done.  I changed them to "The following tests are based on the output
of...".

Thanks,

Simon