This update for gdb fixes the following issues:

- Fix .debug_types problems. (bsc#1168394)
This will solve a range loop index in find_method and will fix
toplevel types when a program is compiled with -fdebug-types-section
- Fix python 3.8 warning. (bsc#1169495)
Fix incorrect use of 'is' operator for comparison in python/lib/gdb/command/prompt.py
The 'is' operator is not meant to be used for comparisons
- Fix build with gcc 10 improving endianess detection. (bsc#1169368)
- Fix hang after SIGKILL

This update was imported from the SUSE:SLE-15-SP1:Update update project.