[gdb] Use using instead of typedef some more (part 1)

[gdb] Use using instead of typedef some more (part 1)

Result of:
...
$ find gdb* -type f -name "*.[ch]" -o -name "*.cc" \
    | egrep -v /testsuite/ \
    | xargs sed -i \
        's/^\([ \t]*\)typedef \([a-zA-Z_0-9:<>,.() ]*\) \([a-zA-Z_0-9]*\)\(\[.*\]\);/\1using \3 = \2\4;/'
$ find gdb* -type f -name "*.[ch]" -o -name "*.cc" \
    | egrep -v /testsuite/ \
    | xargs sed -i \
        's/^\([ \t]*\)typedef \([a-zA-Z_0-9:<>,.()\* ]*\) \([a-zA-Z_0-9]*\);/\1using \3 = \2;/'
...
and manually reverting to changes in comments.

Approved-By: Tom Tromey <tom@tromey.com>