doc: Update for NDK r15b
doc: Update for NDK r15b

Change-Id: I5a9104d6dcfa74ce2aadd8f62dbef47e2d56d73f
Reviewed-on: https://chromium-review.googlesource.com/550355
Reviewed-by: Joshua Peraza <f5809a5e35ec7e1bd0e25cb0a0b68bb433cf6f17@chromium.org>

atom/crashpad,chromium/crashpad,atom/crashpad,chromium/crashpad,atom/crashpad,chromium/crashpad