LTP: Fixed lgetxattr02 testcase

[vamsikrishna935]

• Patch Description:
  Test failure reason in SGX-LKL:
  [[ SGX-LKL ]] libc_start_main_stage2(): Calling app main: /ltp/testcases/kernel/syscalls/lgetxattr/lgetxattr02
  tst_test.c:1106: INFO: Timeout per run is 0h 05m 00s
  tst_test.c:1125: INFO: No fork support
  lgetxattr02.c:78: CONF: no xattr support in fs or mounted without user_xattr option

• Workaround to fix the issue:
  Modified the tests to use root filesystem.
  Disabled a test, which needs to be enabled once git issue [Tests] lkl_access_ok() should return failure on test invalid access, not fatal exit. sgx-lkl#297 is fixed

[hukoyu]

@vamsikrishna935 general looks good. Please just add more detailed comment as I requested. Thanks

[SeanTAllen]

This needs a corresponding PR on sgx-lkl so that CI is run with this change. Please speak to @hukoyu if you aren't familiar with how to do that.

[SeanTAllen]

Why does it need to use the root filesystem? This might be a bug that can be fixed rather than patching tests.

[vamsikrishna935]

Why does it need to use the root filesystem? This might be a bug that can be fixed rather than patching tests.

@SeanTAllen : Logged an issue : lsds/sgx-lkl#736

[hukoyu]

lsds/sgx-lkl#727 fixes the issue 297. When it is merged we will not need to disable test.
Also let's wait result of lsds/sgx-lkl#736 for xattr attribute for /tmp.

[hukoyu]

@vamsikrishna935 lsds/sgx-lkl#297 is fixed and merged. Please revert 297 related changes from this PR.

[vamsikrishna935]

@vamsikrishna935 lsds/sgx-lkl#297 is fixed and merged. Please revert 297 related changes from this PR.

@hukoyu Done.
@davidchisnall Could you please review

[hukoyu]

LGTM.