llvmPackages: don't exclude FreeBSD from -lunwind

The exception for FreeBSD was added in 0afe9d1f704 ("freebsd packages:
Init at 13.1"), but it seems to have been erroneous, as e.g. ncurses
fails to build:

	x86_64-unknown-freebsd13-clang++  -o demo ../obj_s/demo.o -L../lib -lncurses++w -L../lib -lformw -lmenuw -lpanelw -lncursesw   -lutil     -DHAVE_CONFIG_H -DBUILDING_NCURSES_CXX -I../c++ -I. -I../include  -DNDEBUG -O2  -fPIC -DPIC
	x86_64-unknown-freebsd13-ld: error: undefined symbol: _Unwind_Resume
	>>> referenced by demo.cc
	>>>               ../obj_s/demo.o:(TestApplication::run())
	>>> referenced by demo.cc
	>>>               ../obj_s/demo.o:(_GLOBAL__sub_I_demo.cc)
	>>> referenced by demo.cc
	>>>               ../obj_s/demo.o:(NCursesUserItem<UserData>::NCursesUserItem(char const*, char const*, UserData const*))
	>>> referenced 46 more times
	clang-12: error: linker command failed with exit code 1 (use -v to see invocation)

This is fixed by undoing the change, adding -lunwind on FreeBSD.

1 files changed, 1 insertions, 1 deletions

diff --git a/pkgs/development/compilers/llvm/14/default.nix b/pkgs/development/compilers/llvm/14/default.nix
index 8965388ae691c..722603bb70628 100644
--- a/pkgs/development/compilers/llvm/14/default.nix
+++ b/pkgs/development/compilers/llvm/14/default.nix
@@ -167,7 +167,7 @@ let
         ]
         ++ lib.optional (!stdenv.targetPlatform.isWasm) "--unwindlib=libunwind"
         ++ lib.optional
-          (!stdenv.targetPlatform.isWasm && !stdenv.targetPlatform.isFreeBSD && stdenv.targetPlatform.useLLVM or false)
+          (!stdenv.targetPlatform.isWasm && stdenv.targetPlatform.useLLVM or false)
           "-lunwind"
         ++ lib.optional stdenv.targetPlatform.isWasm "-fno-exceptions";
     };