Docs: Fixing disappearance of the left-navs in NDK minisite.
Docs: Fixing disappearance of the left-navs in NDK minisite.

When the filepath changed from html-ndk/ndk/ to html/ndk, the build
system could no longer find the _toc files. This change fixes that issue.

Change-Id: I51f19159e6636fb90ed04013b11d7f95fb4e04c3

xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build