wrong number of functions detected by PIN 4.2

[ilmanzo]

followup from #110, CURL is fixed by un-stripping the binary (merging the debug symbols back in the original executable)
https://openqa-assets.opensuse.org/tests/5864888/file/coverage_report-curl.html

we need to understand why in other binaries all the functions are not being enumerated.

Some example:

https://openqa-assets.opensuse.org/tests/5864888/file/coverage_report-gd2togif.html

https://openqa-assets.opensuse.org/tests/5864888/file/coverage_report-bzip2.html

https://openqa-assets.opensuse.org/tests/5864888/file/coverage_report-gzip.html

[ilmanzo]

on last build, bzip2 improved:
https://openqa-assets.opensuse.org/tests/5865899/file/coverage_report-bzip2.html

while gzip still reporting only 2 functions
https://openqa-assets.opensuse.org/tests/5865899/file/coverage_report-gzip.html

[ilmanzo]

closing as we dropped PIN with #116