Introduce the notion of a 'sample comment'.

- presence of the sample's reported.by file is now mandatory.
- when saving a sample, reporter name & URL are queried, to avoid operator forget about creating the reported.by file.
- when saving a sample, one can store a few-liner comment.
- when recalling a sample, the reporter name, URL and comment (if present) are printed.
- update the powerpc-e500v2-linux-gnuspe sample to include Nate's comment (from his original mail).
- update all samples that were missing the reported.by file.

/trunk/scripts/saveSample.sh | 46 35 11 0 ++++++++++++++++++------
/trunk/scripts/showSamples.sh | 12 6 6 0 +++---
/trunk/samples/powerpc-e500v2-linux-gnuspe/reported.by | 15 15 0 0 ++++++++
/trunk/samples/samples.mk | 22 17 5 0 +++++++++--
4 files changed, 73 insertions(+), 22 deletions(-)

 --- libc/nptl/sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h    2006/10/29 21:48:06     1.6

 +++ libc/nptl/sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h    2007/03/13 21:28:03     1.7

 @@ -55,6 +55,7 @@

  	bne	a3, SYSCALL_ERROR_LABEL;			\

  __LABEL($pseudo_ret)						\

  	.subsection 2;						\

 +	cfi_startproc;						\

  __LABEL($pseudo_cancel)						\

  	subq	sp, 64, sp;					\

  	cfi_def_cfa_offset(64);					\

 @@ -90,12 +91,13 @@

  	cfi_def_cfa_offset(0);					\

  __LABEL($syscall_error)						\

  	SYSCALL_ERROR_HANDLER;					\

 +	cfi_endproc;						\

  	.previous

  # undef PSEUDO_END

  # define PSEUDO_END(sym)					\

 -	.subsection 2;						\

  	cfi_endproc;						\

 +	.subsection 2;						\

  	.size sym, .-sym

  # define SAVE_ARGS_0	/* Nothing.  */