perf probe: Change function definition check due to broken DWARF

Since some gcc generates a broken DWARF which lacks DW_AT_declaration
attribute from the subprogram DIE of function prototype.
(https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97060

)

So, in addition to the DW_AT_declaration check, we also check the
subprogram DIE has DW_AT_inline or actual entry pc.

Committer testing:

  # cat /etc/fedora-release
  Fedora release 33 (Thirty Three)
  #

Before:

  # perf test vfs_getname
  78: Use vfs_getname probe to get syscall args filenames             : FAILED!
  79: Check open filename arg using perf trace + vfs_getname          : FAILED!
  81: Add vfs_getname probe to get syscall args filenames             : FAILED!
  #

After:

  # perf test vfs_getname
  78: Use vfs_getname probe to get syscall args filenames             : Ok
  79: Check open filename arg using perf trace + vfs_getname          : Ok
  81: Add vfs_getname probe to get syscall args filenames             : Ok
  #

Reported-by: Thomas Richter <tmricht@linux.ibm.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Sumanth Korikkar <sumanthk@linux.ibm.com>
Link: http://lore.kernel.org/lkml/160645613571.2824037.7441351537890235895.stgit@devnote2


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>