Suppress -Wstring-plus-int warning

clang-r353983 emits the following new warning:

  external/f2fs-tools/mkfs/f2fs_format.c:1557:37: error: adding 'int' to a string does not append to the string [-Werror,-Wstring-plus-int]
                  memcpy(dent_blk->filename[3], LPF + F2FS_SLOT_LEN,
                                                ~~~~^~~~~~~~~~~~~~~
  external/f2fs-tools/mkfs/f2fs_format.c:1557:37: note: use array indexing to silence this warning
                  memcpy(dent_blk->filename[3], LPF + F2FS_SLOT_LEN,
                                                    ^
                                                &   [              ]

Test: m checkbuild
Bug: 128878287
Change-Id: I823408b594381ed48a036667cbde708a5b76c82e
Exempt-From-Owner-Approval: Trivial change.
1 file changed