[PATCH][gdb/symtab] Support DW_AT_main_subprogram with -readnow.

[Tom Tromey]

>>>>> "Tom" == Tom de Vries <tdevries@suse.de> writes:

Tom> DW_AT_main_subprogram is supported in normal mode in read_partial_die, but not
Tom> in -readnow mode.

Tom> Fix this by adding support for DW_AT_main_subprogram in read_func_scope.

Tom> Tested on x86_64-linux with native and RFC target board readnow (
Tom> https://sourceware.org/ml/gdb-patches/2019-05/msg00073.html ).

Tom> OK for trunk?

Thank you for the patch.  This is ok.

Tom