godoc: godoc: Use IsAbs to test for absolute paths (fix for win32).
godoc: godoc: Use IsAbs to test for absolute paths (fix for win32).

One more case.

R=r, r2
CC=golang-dev
http://codereview.appspot.com/4170044

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