revert go1.3rc2

The Windows build is still bad. The previous CL is not go1.3rc2.

TBR=bradfitz
R=golang-codereviews
CC=golang-codereviews
https://golang.org/cl/107050043

VERSION

diff --git a/VERSION b/VERSION
index 71d5f5a..e0765db 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-go1.3rc2
+go1.3rc1
\ No newline at end of file