Disable libpsl when compiling libcurl

libpsl is a lib that provides the Public Suffix List: the list
of all TLDs.
It's an optional feature of libcurl that we dont need for libkiwix.

Leaving it included causes issues when compiling for apple_all_static
on x86_64 as libpsf is installed (and thus found by libcurl's configure)
but is obviously only for x86_64.

An alternative could be to either cross-compile it first and properly
reference that version.

That sounds like too much effort for a feature we know we dont need.

https://github.com/rockdaboot/libpsl

kiwixbuild/dependencies/libcurl.py

@@ -32,6 +32,7 @@ class Builder(MesonBuilder):
         configure_options = [
             f"-D{p}=disabled"
             for p in (
+                "psl",
                 "ssh",
                 "ssl",
                 "rtmp",