make sure there is always a build directory to put doxgen stuff html in

make sure there is always a build directory to put doxgen stuff html in

currently if you do a make clean-all or have never done a code build, there will be no build directory and doxygen is going to want to create and put files into build/docs/html

BUG=
R=stichnot@chromium.org

Committed: https://gerrit.chromium.org/gerrit/gitweb?p=native_client/pnacl-subzero.git;a=commit;h=426a21e1a0850224a565d7a38daa6525da30523e

[rkotlerimgtec, 2016-01-08 03:02:36]

Description was changed from

==========
make sure there is always a build directory to put doxgen stuff html in

BUG=
==========

to

==========
make sure there is always a build directory to put doxgen stuff html in

currently if you do a make clean-all or have never done a code build, there will
be no build directory and doxygen is going to want to create and put files into
build/docs/html

BUG=
==========

[rkotlerimgtec, 2016-01-08 03:02:36]

rkotlerimgtec@gmail.com changed reviewers:
+ jpp@chromium.org, kschimpf@chromium.org, stichnot@chromium.org

[Jim Stichnoth, 2016-01-08 05:41:51]

lgtm

[Jim Stichnoth, 2016-01-08 05:42:40]

Description was changed from

==========
make sure there is always a build directory to put doxgen stuff html in

currently if you do a make clean-all or have never done a code build, there will
be no build directory and doxygen is going to want to create and put files into
build/docs/html

BUG=
==========

to

==========
make sure there is always a build directory to put doxgen stuff html in

currently if you do a make clean-all or have never done a code build, there will
be no build directory and doxygen is going to want to create and put files into
build/docs/html

BUG=
R=stichnot@chromium.org

Committed:
https://gerrit.chromium.org/gerrit/gitweb?p=native_client/pnacl-subzero.git;a...
==========

[Jim Stichnoth, 2016-01-08 05:42:41]

Committed patchset #1 (id:1) manually as
426a21e1a0850224a565d7a38daa6525da30523e (presubmit successful).