Add checks for liblua-*.so.0 for alpine compatibility.

scripts/ax_lua.m4

@@ -626,6 +626,8 @@ AC_DEFUN([AX_LUA_LIBS],
         lua$LUA_SHORT_VERSION \
         lua-$LUA_VERSION \
         lua-$LUA_SHORT_VERSION \
+        :liblua-$LUA_VERSION.so.0 \
+        :liblua-$LUA_SHORT_VERSION.so.0 \
         lua \
       ],
       [_ax_found_lua_libs='yes'],

scripts/checks.m4

@@ -400,7 +400,7 @@ AC_DEFUN([TORRENT_WITH_XMLRPC_C], [
       else
         xmlrpc_cc_prg="$withval"
       fi
-      
+
       if eval $xmlrpc_cc_prg --version 2>/dev/null >/dev/null; then
         CXXFLAGS="$CXXFLAGS `$xmlrpc_cc_prg --cflags server-util`"
         LIBS="$LIBS `$xmlrpc_cc_prg server-util --libs`"