libxl: expand hard tab stops

libxl: expand hard tab stops

I ran the following and committed the result. ^I is an actual hard tab

for i in $(grep -l --exclude=*_[ly].\[ch\] '^I' tools/libxl/*.[ch]) ; do
     cat $i | expand | sponge $i
done

There are some actually wrong indentations too, I'll fix those up
manually.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>