* linux-headers@4.15: new formula
* linux-headers: rename to linux-headers@4.4
* linux-headers@4.4: renamed from linux-headers
* linux-headers: make alias to linux-headers@4.4
* formula_renames.json: rename linux-headers to linux-headers@4.4
* versioned_keg_only_allowlist: add linux-headers@4.4
* glibc: use linux-headers@4.4
* strace: use linux-headers@4.4