parse.py

import re
section = ''
print "o, size"
for line in open('breakdown.txt'):
    m = re.search('libMapbox.a\(([\w\.]+)\):', line)
    if m:
        section = m.group(1)
    total = re.search('total (\d+)', line)
    if total and section:
        print "%s, %s" % (section, total.group(1))
        section = ''

run.sh

size -m libMapbox.a > breakdown.txt
python parse.py > data.csv