[CMake] Fix building on Haiku and Solaris after c0d5d36 (llvm#78084)

Haiku and Solaris need some additional libraries after the commit
c0d5d36

Otherwise fails to link a whole bunch of the tools and other binaries
with undefined symbols with accept() and connect().

I did a static and dynamic build on illumos and a dynamic build on
Haiku.

```
-DLLVM_ENABLE_PROJECTS='clang;clang-tools-extra;lld;mlir'
```
and on illumos
```
-DLLVM_ENABLE_RUNTIMES='openmp'
```

llvm/lib/Support/CMakeLists.txt

@@ -65,14 +65,14 @@ elseif( CMAKE_HOST_UNIX )
     set(system_libs ${system_libs} m)
   endif()
   if( UNIX AND ${CMAKE_SYSTEM_NAME} MATCHES "SunOS" )
-    set(system_libs ${system_libs} kstat)
+    set(system_libs ${system_libs} kstat socket)
   endif()
   if( FUCHSIA )
     set(system_libs ${system_libs} zircon)
   endif()
   if ( HAIKU )
     add_compile_definitions(_BSD_SOURCE)
-    set(system_libs ${system_libs} bsd)
+    set(system_libs ${system_libs} bsd network)
   endif()
 endif( MSVC OR MINGW )
 

llvm/tools/llvm-jitlink/CMakeLists.txt

@@ -28,12 +28,8 @@ add_llvm_tool(llvm-jitlink
   llvm-jitlink-statistics.cpp
   )
 
-if(${CMAKE_SYSTEM_NAME} MATCHES "Haiku")
-  target_link_libraries(llvm-jitlink PRIVATE network)
-endif()
-
-if(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
-  target_link_libraries(llvm-jitlink PRIVATE socket nsl)
-endif()
+ if(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
+  target_link_libraries(llvm-jitlink PRIVATE socket)
+ endif()
 
 export_executable_symbols(llvm-jitlink)

llvm/tools/llvm-jitlink/llvm-jitlink-executor/CMakeLists.txt

@@ -11,12 +11,4 @@ add_llvm_utility(llvm-jitlink-executor
   intrinsics_gen
 )
 
-if(${CMAKE_SYSTEM_NAME} MATCHES "Haiku")
-  target_link_libraries(llvm-jitlink-executor PRIVATE network)
-endif()
-
-if(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
-  target_link_libraries(llvm-jitlink-executor PRIVATE socket)
-endif()
-
 export_executable_symbols(llvm-jitlink-executor)