Fix linked libs for linux

Link `pthread` and `z` on linux as well. Link `tinfo` if `/usr/lib/libtinfo.so` file exists. This is required because despite explicitly disabling these libs in LLVM build config they still somehow get pulled in on some systems. `pthread` and `z` are standard components of every linux distribution therefore linking them unconditionally is OK. `tinfo` may not exist on some systems therefore it's existence is checked first. With this patch finally builds produced on Archlinux no longer result in `DllNotFoundException`.

build/LLVM.lua

@@ -94,13 +94,20 @@ function SetupLLVMLibs()
     defines { "__STDC_CONSTANT_MACROS", "__STDC_LIMIT_MACROS" }
 
   filter { "system:macosx" }
-    links { "c++", "curses", "pthread", "z" }
-    
+    links { "c++", "curses" }
+
+  filter { "system:macosx or system:linux" }
+    links { "pthread", "z" }
+
   filter { "action:vs*" }
     links { "version" }
 
   filter {}
 
+  if os.ishost("linux") and os.isfile("/usr/lib/libtinfo.so") then
+    links { "tinfo" }
+  end
+
   if LLVMDirPerConfiguration then
     filter { "configurations:Debug" }
       libdirs { path.join(LLVMRootDirDebug, "build/lib") }