redhat/configs: Make merge.py portable for older python
DESCRIPTION
Since the operand := was only introduced on python-38, the merge.py script
breaks when make rh-configs
is run on systems with older python versions
TESTING
A few errors as the following are observed:
cd .../kernel-ark/redhat/configs; ./build_configs.sh "partial" "snip"
Building .../kernel-ark/redhat/configs/partial-kgcov-snip.config ...
File "./merge.py", line 35
if m := isset.match(line):
^
SyntaxError: invalid syntax
Failed to merge config-common-kgcov
Signed-off-by: Desnes Nunes desnesn@redhat.com