cmd/5l: reorder some struct fields to reduce memory consumption Valgrind Massif result when linking godoc: On amd64:                     old          new         -/+ mem_heap_B       185844612    175358047    -5.7% mem_heap_extra_B    773404       773137    -0.0%
cmd/5l: reorder some struct fields to reduce memory consumption
Valgrind Massif result when linking godoc:
On amd64:
                    old          new         -/+
mem_heap_B       185844612    175358047    -5.7%
mem_heap_extra_B    773404       773137    -0.0%

On 386/ARM:
                    old          new         -/+
mem_heap_B       141775701    131289941    -7.4%
mem_heap_extra_B    737011       736955    -0.0%

R=golang-dev, r, dave
CC=golang-dev
http://codereview.appspot.com/6655045

pombredanne/go-deleteme,apparentlymart/golang,pombredanne/go-deleteme,dsriram/golang,dsriram/golang,apparentlymart/golang,apparentlymart/golang,apparentlymart/golang,tv42/old-go,gnanderson/go,apparentlymart/golang,pombredanne/go-deleteme,tv42/old-go,tv42/old-go,tv42/old-go,dsriram/golang,gnanderson/go,pombredanne/go-deleteme,tv42/old-go,dsriram/golang,pombredanne/go-deleteme,gnanderson/go,dsriram/golang,gnanderson/go,gnanderson/go,tv42/old-go,pombredanne/go-deleteme,apparentlymart/golang,pombredanne/go-deleteme,gnanderson/go,dsriram/golang,dsriram/golang,apparentlymart/golang,tv42/old-go,gnanderson/go