Revert "plugin/core: autotools: make awk crlf agnostic when generating ps.h"

Revert "plugin/core: autotools: make awk crlf agnostic when generating ps.h"

This reverts commit 50e7d9768b9c02287a0d68e64233c7f713d1f4b8.

In standard awk, only the first character in RS is used, so regular expressions don't work. This means the resulting ps.h in plugins/core contains an illegal C string constant.