libtracefs: update to 1.8

libtracefs: update to 1.8

Changes:
67f3b2a libtracefs: version 1.8
8a1322f libtracefs utest: Add tests to use mapping if supported
0a65b79 libtracefs: Add tracefs_mapped_is_supported() API
805f650 libtracefs: Call mmap ioctl if a refresh happens
cf7e2a5 libtracefs: Fix tracefs_mmap() kbuf usage
3a26b26 libtracefs: Have nonblock tracefs_cpu reads set errno EAGAIN
2b5bb09 libtracefs: Have tracefs_mmap_read() include subbuf meta data
dee0448 libtracefs: Have mapping work with the other tracefs_cpu* functions
28eebc1 libtracefs: Have tracefs_cpu_flush(_buf)() use mapping
065d914 libtracefs: Use mmapping for iterating raw events
1124e0e libtracefs: Use tracefs_cpu_*_buf() calls for iterator
f43b293 libtracefs: Unmap mmap mapping on tracefs_cpu close
0d24516 libtracefs Documentation: Fix tracefs_cpu_snapshot_open() man pages
5ff31c0 libtracefs Documentation: Add tracefs_follow_events_clear() to main man page
0c7d9f7 libtracefs: Add man pages for tracefs_snapshot_*() functions
b2dc3e0 libtracefs sql: Rename TIMESTAMP_USECS_DELTA to TIMESTAMP_DELTA_USECS
585ec77 libtracefs: Force off trace mmapping
2ed14b5 libtracefs: Add ring buffer memory mapping APIs
173ffc0 libtracefs meson: Add option to disable samples
a55e2e8 libtracefs meson: Add option to disable documentation
93e20af libtracefs: Fix tracefs_instance_reset to clear synthetic events
a1ecbff libtracefs utest: Add more tests to test tracefs_sql()
975c37c libtracefs utest: Add matches to trace_sql() tests
0567e2d libtracefs synthetic: Handle hashed name variables
fcb3a83 libtracefs synthetic: Remove multiple adding of action in tracefs_synth_save()
a9dae65 libtracefs: Fix sqlhist used uninitialized error
fe7a467 libtracefs: Add updating and reading snapshot buffers
1ad57ab libtracefs: Add PID filtering API
d8726bf libtracefs: Also clear max_graph_depth on reset
eb4dd60 libtracefs: Add TIMESTAMP_USECS_DELTA to simplify SQL timestamp compares
8c57eb4 libtracefs: Add tracefs_instance_set/get_subbuf_size()
9bafb21 libtracefs: Add API to extract ring buffer statistics
141d25e libtracefs: Add tracefs_load_headers() API
ef3fae7 libtracefs: Add kerneldoc comments to tracefs_instance_set_buffer_size()
31acfe1 libtracefs utest: Add test to test tracefs_instance_set/get_buffer_percent()
3e6d975 libtracefs: Add tracefs_instance_clear() API
c4efaaf libtracefs: Add tracefs_instance_get/set_buffer_percent()
1e1cc54 libtracefs: Add API to read tracefs_cpu and return a kbuffer
7d395b1 libtracefs: Add tracefs_instance_file_write_number()
e34cbd8 libtracefs: Increase splice to use pipe max size
1f50965 libtracefs: Add API to remove followers from an instance or toplevel
576ee0b libtracefs: Reset tracing before and after unit tests
118b694 libtracefs: Free dynamic event list in utest
5159973 libtracefs: Free tracing_dir in case of remount
df563eb libtracefs: Free buf in clear_func_filter()
3cbac37 libtracefs: Free "missed_followers" of instance
0cbe56e libtracefs testing: Use one tep handle for most tests
adac30f libtracefs Documentation: Fix tracefs_event_file_exists() issues
07ab199 libtracefs: Pass enum value where expected instead of int
bb299b4 libtracefs: fix cscope makefile rule
420d677 libtracefs: Free "followers" when freeing instance
3f436fc libtracefs: Fix documentation of tracefs_trace_pipe_stream() flags
1fde9df libtracefs: Add explicit pthread dependency to meson
d1989ae tracefs-perf: Add missing headers for syscall() and SYS_* defines

Signed-off-by: Nick Hainke <vincent@systemli.org>