binutils: Fix CVE-2025-5244 & CVE-2025-5245

binutils: Fix CVE-2025-5244 & CVE-2025-5245

PR32858 ld segfault on fuzzed object
We missed one place where it is necessary to check for empty groups.

PR32829, SEGV on objdump function debug_type_samep
u.kenum is always non-NULL, see debug_make_enum_type.

Upstream-Status: Backport
[https://sourceware.org/git/?p=binutils-gdb.git;a=patch;h=d1458933830456e54223d9fc61f0d9b3a19256f5]
&& [https://sourceware.org/git/?p=binutils-gdb.git;a=patch;h=6c3458a8b7ee7d39f070c7b2350851cb2110c65a]

Signed-off-by: Deepesh Varatharajan <Deepesh.Varatharajan@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>