make db-tools: suspend enum-int linter error

[AskAlexSharov]

 error: conflicting types for ‘mdbx_get_datacmp’ due to enum/integer mismatch; have ‘int (*(unsigned int))(const MDBX_val *, const MDBX_val *)’ {aka ‘int (*(unsigned int))(const struct iovec *, const struct iovec *)’} [-Werror=enum-int-mismatch]
26609 | __cold MDBX_cmp_func *mdbx_get_datacmp(unsigned flags) {
      |                       ^~~~~~~~~~~~~~~~
mdbx.h:4932:1: note: previous declaration of ‘mdbx_get_datacmp’ with type ‘int (*(MDBX_db_flags_t))(const MDBX_val *, const MDBX_val *)’ {aka ‘int (*(MDBX_db_flags_t))(const struct iovec *, const struct iovec *)’}

can't upgrade mdbx version for now