writable and executable sections

[Alessandro-Barbieri]

Gentoo's CI found this issue

 * QA Notice: The following files contain writable and executable sections
 *  Files with such sections will not work properly (or at all!) on some
 *  architectures/operating systems.  A bug should be filed at
 *  https://bugs.gentoo.org/ to make sure the issue is fixed.
 *  For more information, see:
 * 
 *    https://wiki.gentoo.org/wiki/Hardened/GNU_stack_quickstart
 * 
 *  Please include the following list of files in your report:
 *  Note: Bugs should be filed for the respective maintainers
 *  of the package in question and not [email protected].
 * RWX --- --- usr/lib64/libcbutterflypack.so.2.1.1
 * RWX --- --- usr/lib64/libsbutterflypack.so.2.1.1
 * RWX --- --- usr/lib64/libzbutterflypack.so.2.1.1
 * RWX --- --- usr/lib64/libdbutterflypack.so.2.1.1

See https://bugs.gentoo.org/848039
log https://848039.bugs.gentoo.org/attachment.cgi?id=781349