Avoid using separate section for infrequently used functions on apple arm64 builds

[glguy]

This fixes a linker error where the __cstrings section puts the two code sections too far apart

[RyanGlScott]

Nice catch!

Now that we've narrowed down the issue to lmdb (a fairly popular C library), this made me wonder if someone else has noticed this issue in another project. And sure enough, someone did:

• Upstream OpenLDAP issue: https://bugs.openldap.org/show_bug.cgi?id=9919
• Related LLVM lld linker issue: ld64.lld: error: relocation BRANCH26 is out of range: -165194492 is not in [-134217728, 134217727]; references _calloc llvm/llvm-project#52767

The lld linker issue has since been fixed upstream (see llvm/llvm-project#99052), but it likely won't make its way into Xcode for a while. Meanwhile, OpenLDAP (which maintains the lmdb C library) has adopted a different workaround in https://git.openldap.org/openldap/openldap/-/merge_requests/563. (I haven't tested to see if this workaround would also fix the linker issue, but I suspect it would.) This workaround is included in the 0.9.30 release of lmdb, while this Haskell library currently vendors version 0.9.29.

Personally, I would prefer to keep the vendored version of lmdb as close to an upstream release as possible. As such, I am inclined to fix this linker issue by upgrading from 0.9.29 to 0.9.30 rather than by applying additional patches. I've opened a separate PR (#5) for this.