gdb.base/annota1.exp tweak for hpux11

[law at redhat dot com]

When using ttrace on hpux11, SIGTRAP events are not normally passed along
to the inferior process.

There is a bit which can be set which is supposed to allow SIGTRAP events
to be delivered to the child; however, setting that bit has had no observable
impact (and yes, I verified that the bit was set by reading back the 
structure via a second ttrace call :-)

This is of interest because annota1.exp sends a SIGTRAP to the child and
expects it to be delivered.  If the signal isn't delivered we get a 
testsuite failure.  

Given that I haven't been able to find a way to actually get the proper
behavior from hpux11 (which included searching their support site for
relevant kernel & library updates), my recommendation is to xfail the test.

	* gdb.base/annota1.exp: Expect failure for hpux11 when posting
	a SIGTRAP to the inferior.

Index: annota1.exp
===================================================================
RCS file: /cvs/cvsfiles/devo/gdb/testsuite/gdb.base/annota1.exp,v
retrieving revision 1.13
diff -c -3 -p -r1.13 annota1.exp
*** annota1.exp	2001/06/14 21:03:31	1.13
--- annota1.exp	2001/12/19 23:46:46
*************** gdb_expect {
*** 424,429 ****
--- 424,438 ----
  # FIXME: annotate-signal not tested (requires that the inferior be 
  #                        stopped by a "random" signal)
  #
+ # SIGTRAP signals are dropped before they get to the inferior process
+ # on hpux11.  In theory, this behaivor can be controlled by setting
+ # TTEO_NORM_SIGTRAP in the inferior, but doing so did not cause
+ # the signal to be properly delivered.
+ #
+ # It has been verified that other signals will be delivered.  However,
+ # rather than twiddle the test, I choose to leave it as-is as it
+ # exposes an interesting failure on hpux11.
+ setup_xfail hppa*-*-hpux11*
  send_gdb "signal SIGTRAP\n"
  gdb_expect {
    -re ".*\032\032post-prompt\r\nContinuing with signal 
SIGTRAP.\r\n\r\n\032\032starting\r\n\r\n\032\032frames-invalid\r\n\r\n\032\032f
rames-invalid\r\n\r\n\032\032signalled\r\n\r\nProgram terminated with signal 
\r\n\032\032signal-name\r\nSIGTRAP\r\n\032\032signal-name-end\r\n, 
\r\n\032\032signal-string\r\nTrace.breakpoint trap\r\n\032\032signal-string-end
\r\n.\r\nThe program no longer exists.\r\n\r\n\032\032stopped\r\n$gdb_prompt$" 
\