Implement decoding of open_tree syscall
... introduced by Linux kernel commits v5.2-rc1~141^2~9,
v5.2-rc1~20^2~1, and v5.2-rc1~20^2.
* configure.ac (AC_CHECK_HEADERS): Add linux/mount.h.
* open_tree.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* pathtrace.c (pathtrace_match_set): Add SEN_open_tree.
* xlat/open_tree_flags.in: New file.
* linux/syscallent-common.h [BASE_NR + 428]: Wire up open_tree.
* NEWS: Mention this change.
* tests/open_tree.c: New file.
* tests/open_tree-P.c: Likewise.
* tests/gen_tests.in (open_tree, open_tree-P): New entries.
* tests/pure_executables.list: Add open_tree and open_tree-P.
* tests/.gitignore: Likewise.
12 files changed: