perf symbols: Remove some unnecessary includes from symbol.h

And fixup the fallout in places like annotation and jitdump that were
using things like dirname() but weren't including libgen.h, etc.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-wrii9hy1a1wathc0398f9fgt@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/jitdump.c

@@ -2,6 +2,7 @@
 #include <sys/sysmacros.h>
 #include <sys/types.h>
 #include <errno.h>
+#include <libgen.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>