git: openjdk/jdk-sandbox: riscv-port-branch: fix indenting and LDFLAGS: -latomic for RV64

[duke]

Changeset: 5be0de4d
Author:    zhuyanhong <zhuyanhong2 at huawei.com>
Date:      2021-10-18 19:27:04 +0000
URL:       https://git.openjdk.java.net/jdk-sandbox/commit/5be0de4d024d26e0e2fcc96a732791cab21ef662

fix indenting and LDFLAGS: -latomic for RV64

! make/autoconf/build-aux/autoconf-config.guess
! make/autoconf/libraries.m4
! test/hotspot/jtreg/compiler/vectorapi/TestLoopStoreVector.java