PR23160,PR14690: fix to exclude __do_ variants of syscalls

PR23160,PR14690: fix to exclude __do_ variants of syscalls

* tapset/linux/sysc_*.stp: changed wildcards to be more specific

* tapset/linux/syscall_aux2.stpm: new file to define @arch_syscall_prefix

* tapsets.cxx: add support for alternation operators in function probes

* util.cxx: add translation from csh-style brace globs to ksh-style @(a|b) to
  be able to use {foo,bar} syntax in places where fnmatch() is used

* util.h: add function prototype for csh_to_ksh()