patch 9.0.1433: on some systems the Lua library is not found

Problem:    On some systems the Lua library is not found.
Solution:   Check if a subdirectory for Lua exists.  (closes #4475)
diff --git a/src/auto/configure b/src/auto/configure
index eddb721..ba5a074 100755
--- a/src/auto/configure
+++ b/src/auto/configure
@@ -5575,10 +5575,15 @@
 	LUA_LIBS="-L${vi_cv_path_lua_pfx}/${lib_multiarch} -lluajit-$vi_cv_version_lua"
       fi
     else
-      if test "X$LUA_INC" != "X"; then
-		LUA_LIBS="-L${vi_cv_path_lua_pfx}/lib -llua$vi_cv_version_lua"
+            if test -d "${vi_cv_path_lua_pfx}/lib/lua$vi_cv_version_lua"; then
+	LUALIBDIR="lib/lua$vi_cv_version_lua"
       else
-	LUA_LIBS="-L${vi_cv_path_lua_pfx}/lib -llua"
+	LUALIBDIR=lib
+      fi
+      if test "X$LUA_INC" != "X"; then
+		LUA_LIBS="-L${vi_cv_path_lua_pfx}/${LUALIBDIR} -llua$vi_cv_version_lua"
+      else
+	LUA_LIBS="-L${vi_cv_path_lua_pfx}/${LUALIBDIR} -llua"
       fi
     fi
     if test "$enable_luainterp" = "dynamic"; then