doc/go1.3.txt: add file to track significant CLs for 1.3

Nothing significant so far (right?), but let's lay the keystone.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/36830043

diff --git a/doc/go1.3.txt b/doc/go1.3.txt
new file mode 100644 (file)
index 0000000..e92cff4
--- /dev/null
+++ b/doc/go1.3.txt
@@ -0,0 +1 @@
+<YOUR CL HERE>