[PATCH] readelf: Allocate job_data one-by-one as needed

[PATCH] readelf: Allocate job_data one-by-one as needed

Currently, job_data is stored in an array whose size is equal to the
number of debug sections (.debug_*, .eh_frame, .gdb_index, etc.).

This size may be too small if a binary contains multiple debug sections
with the same name.  For example an ET_REL binary compiled with -ggdb3
can contain multiple .debug_macro sections.

Fix this by allocating job_data on the fly when preparing to read a
debug section.  This supports an arbitrary number of debug sections
while also avoiding unnecessary memory allocation.

https://sourceware.org/bugzilla/show_bug.cgi?id=33580

Signed-off-by: Aaron Merey <amerey@redhat.com>
Gbp-Pq: Name elfutils-0.194-alloc-jobs.patch