Fixed a bug when ./configure wasn't able to detect tor library (#1143)

configure.ac

@@ -455,8 +455,6 @@ case $host in
      ;;
 esac
 
-AC_CHECK_LIB([tor], [tor_main], [AC_MSG_NOTICE([Tor found])], [AC_MSG_ERROR([Can't find Tor library])], [-lssl -lcrypto -levent -lz -pthread])
-
 if test x$use_pkgconfig = xyes; then
   m4_ifndef([PKG_PROG_PKG_CONFIG], [AC_MSG_ERROR(PKG_PROG_PKG_CONFIG macro not found. Please install pkg-config and re-run autogen.sh.)])
   m4_ifdef([PKG_PROG_PKG_CONFIG], [
@@ -982,6 +980,11 @@ dnl Check for libcap
 AC_CHECK_HEADERS([sys/capability.h])
 AC_SEARCH_LIBS(cap_get_proc, [cap])
 
+dnl ============================================================
+dnl Check for libtor
+
+AC_CHECK_LIB([tor], [tor_main], [AC_MSG_NOTICE([Tor found])], [AC_MSG_ERROR([Can't find Tor library])], [-lssl -lcrypto -levent -lz -pthread])
+
 ac_configure_args="${ac_configure_args} --disable-shared"
 
 AM_CONDITIONAL([EMBEDDED_UNIVALUE],[test x$need_bundled_univalue = xyes])