Rename libpcre.wrap to pcre.wrap

It is exactly the same wrap as the one in WrapDB but with a different
name. That fix error when multiple projects uses pcre and they don't
have the same wrap name:

meson.build:1:0: ERROR: Multiple wrap files provide 'libpcre' dependency: pcre.wrap and libpcre.wrap
10 jobs for pcre in 29 minutes and 25 seconds (queued for 5 seconds)
Name Stage Failure
failed
check-todos Style Check
 * branch                pcre       -> FETCH_HEAD
fatal: ambiguous argument 'upstream/master': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'
Couldn’t find common ancestor with upstream main branch. This typically
happens if you branched from main a long time ago. Please update
your clone, rebase, and re-push your branch.
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1

failed
style-check-diff Style Check
 * branch                pcre       -> FETCH_HEAD
fatal: ambiguous argument 'upstream/master': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'
Couldn’t find common ancestor with upstream main branch. This typically
happens if you branched from main a long time ago. Please update
your clone, rebase, and re-push your branch.
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1