malloc/mtrace.c: Cosmetic cleanup.

Remove an unused #define and use ANSI prototypes.

Generated code identical on x86_64-unknown-linux-gnu.

ChangeLog:

2014-02-11  Will Newton  <will.newton@linaro.org>

	* malloc/mtrace.c (attribute_hidden): Remove unused macro
	definition.  (tr_where, tr_freehook, tr_mallochook,
	tr_reallochook, tr_memalignhook): Use ANSI protoype.
include/stap-probe.h: Add comment about SystemTap argument format

Add a comment pointing to the SystemTap wiki page that documents the
format of the arguments. Also add a pointer to the SystemTap and
gdb sources which seem to be the best place to get the architecture
specific details.

ChangeLog:

2014-02-11  Will Newton  <will.newton@linaro.org>

	* include/stap-probe.h: Add comment about probe argument
	format.
manual/probes.texi: Add documentation of setjmp/longjmp probes

Add some documentation of the setjmp, longjmp and longjmp_target
Systemtap probe points.

ChangeLog:

2014-02-11  Will Newton  <will.newton@linaro.org>

	* manual/probes.texi (Internal Probes): Add documentation
	of setjmp, longjmp and longjmp_target probes.
manual/probes.texi: Use "triggered" instead of "hit"

Use the term "triggered" instead of "hit" when talking about probe
points.

ChangeLog:

2014-02-11  Will Newton  <will.newton@linaro.org>

	* manual/probes.texi (Mathematical Function Probes): Use
	"triggered" instead of "hit".