Update prebuilts for mnc-docs

developers/build: fb039d88ed8e9183cae9ce510bf9c907d23ecc50
developers/samples/android: 7c3c09dcf092593adb8c13f8e15260f4da0a799a

Note: This was previously committed on May 18 2016, but wasn't
automerged. Replaying commit to bring browseable back into sync
downstream.

(cherry picked from commit 8e7e496a)
Bug: 29127946
Change-Id: I6275f830532c3c6ce006756aecc3c2ae7e06873d