Compared results with/without -z flags.
Compared results for:
```
readelf -x [section] -z file
readelf -p [section] -z file
```
with GNU's readelf.
```
diff elftoolchain_output gnu_output
```
shows no differenceTested with [ https://reviews.freebsd.org/D26909 | this patch ] that adds readelf seciton decompression.