pcre: Update to version 8.45

pcre: Update to version 8.45

- Update from 8.44 to 8.45
- Updated rootfile
- Checked the dependencies of the old lib versions using find-dependencies
   nothing flagged
- Changelog
   Version 8.45 15-June-2021
    This is the final release of PCRE1. A few minor tidies are included.
   1. CMakeLists.txt has two user-supplied patches applied, one to allow for the
      setting of MODULE_PATH, and the other to support the generation of pcre-config
      file and libpcre*.pc files.
   2. There was a memory leak if a compile error occurred when there were more
      than 20 named groups (Bugzilla #2613).
   3. Fixed some typos in code and documentation.
   4. Fixed a small (*MARK) bug in the interpreter (Bugzilla #2771).

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>