[libcxx] [libunwind] [DRAFT][libc++] Switch FreeBSD to C++26 (PR #86658)

[Ed Maste via cfe-commits]

================
@@ -39,6 +39,9 @@
 # if defined(__HAIKU__)
 #  define _LIBUNWIND_TARGET_HAIKU 1
 # endif
+#if defined(__FreeBSD__)
----------------
emaste wrote:

Yes, libunwind change was included by accident - I just let the CI jobs finish rather than restarting; I will update the pull req to fix.


https://github.com/llvm/llvm-project/pull/86658