[LTP] [PATCH] shell_loader_filesystems: add tmpfs support to avoid fail in GitHub CI

[Li Wang]

FYI:

In the previous github CI, due to the lack of XFS/Btrfs support,
shell_loader_filesystems.sh was not actually tested and resulted
in a False Negative.

See:
https://github.com/linux-test-project/ltp/actions/runs/13968146513/job/39103228371

*** Running 'shell_loader_filesystems.sh' (exp: TPASS) ***
/__w/ltp/ltp/lib/tst_tmpdir.c:316: TINFO: Using /tmp/LTP_shew1KAxt as
tmpdir (overlayfs filesystem)
/__w/ltp/ltp/lib/tst_device.c:98: TINFO: Found free device 0 '/dev/loop0'
/__w/ltp/ltp/lib/tst_test.c:1900: TINFO: LTP version: 20250130
/__w/ltp/ltp/lib/tst_test.c:1904: TINFO: Tested kernel: 6.8.0-1021-azure
#25-Ubuntu SMP Wed Jan 15 20:45:09 UTC 2025 x86_64
/__w/ltp/ltp/lib/tst_kconfig.c:88: TINFO: Parsing kernel config
'/boot/config-6.8.0-1021-azure'
/__w/ltp/ltp/lib/tst_test.c:1722: TINFO: Overall timeout per run is 0h 00m
30s
/__w/ltp/ltp/lib/tst_supported_fs_types.c:97: TINFO: Kernel supports ext2
/__w/ltp/ltp/lib/tst_supported_fs_types.c:58: TINFO: mkfs.ext2 does not
exist
/__w/ltp/ltp/lib/tst_supported_fs_types.c:97: TINFO: Kernel supports ext3
/__w/ltp/ltp/lib/tst_supported_fs_types.c:58: TINFO: mkfs.ext3 does not
exist
/__w/ltp/ltp/lib/tst_supported_fs_types.c:97: TINFO: Kernel supports ext4
/__w/ltp/ltp/lib/tst_supported_fs_types.c:58: TINFO: mkfs.ext4 does not
exist
/__w/ltp/ltp/lib/tst_supported_fs_types.c:97: TINFO: Kernel supports xfs
/__w/ltp/ltp/lib/tst_supported_fs_types.c:58: TINFO: mkfs.xfs does not exist
/__w/ltp/ltp/lib/tst_supported_fs_types.c:97: TINFO: Kernel supports btrfs
/__w/ltp/ltp/lib/tst_supported_fs_types.c:58: TINFO: mkfs.btrfs does not
exist
/__w/ltp/ltp/lib/tst_supported_fs_types.c:105: TINFO: Skipping bcachefs
because of FUSE blacklist
/__w/ltp/ltp/lib/tst_supported_fs_types.c:97: TINFO: Kernel supports vfat
/__w/ltp/ltp/lib/tst_supported_fs_types.c:58: TINFO: mkfs.vfat does not
exist
/__w/ltp/ltp/lib/tst_supported_fs_types.c:128: TINFO: Filesystem exfat is
not supported
/__w/ltp/ltp/lib/tst_supported_fs_types.c:128: TINFO: Filesystem ntfs is
not supported
/__w/ltp/ltp/lib/tst_supported_fs_types.c:97: TINFO: Kernel supports tmpfs
/__w/ltp/ltp/lib/tst_supported_fs_types.c:49: TINFO: mkfs is not needed for
tmpfs

Summary:
passed   0
failed   0
broken   0
skipped  0
warnings 0

-- 
Regards,
Li Wang