update timing logs for benchmarks. some significant improvements: 	reverse-complement 	nbody (gccgo only) 	regex-dna 	pidigits one mysterious drop: 	binary-tree.go (gccgo only)
update timing logs for benchmarks.
some significant improvements:
	reverse-complement
	nbody (gccgo only)
	regex-dna
	pidigits
one mysterious drop:
	binary-tree.go (gccgo only)

R=rsc
CC=golang-dev
http://codereview.appspot.com/181158

wesolows/golang,wesolows/golang,wesolows/golang-old,firebitsbr/golang-old,wesolows/golang-old,firebitsbr/golang-old,wesolows/golang-old,wesolows/golang,firebitsbr/golang-old,firebitsbr/golang-old,wesolows/golang,wesolows/golang,wesolows/golang-old,firebitsbr/golang-old,wesolows/golang-old,firebitsbr/golang-old,firebitsbr/golang-old,wesolows/golang-old,wesolows/golang,firebitsbr/golang-old,wesolows/golang-old,wesolows/golang