docs: Fix Sphinx detection with out-of-tree builds
authorTom Stellard <tstellar@redhat.com>
Tue, 9 May 2017 11:18:03 +0000 (11:18 +0000)
committerTom Stellard <tstellar@redhat.com>
Tue, 9 May 2017 11:18:03 +0000 (11:18 +0000)
commit5a741dd8a6bcb97151c8ba4bc74118ecb019929b
tree9502ab26fee073cb39a10b91d6d5e92a6927543d
parentdd50e9fb153d8786f6d1febdfa3edb07c4a375b1
docs: Fix Sphinx detection with out-of-tree builds

Adapt to changes made in r302499.

llvm-svn: 302517
libcxx/docs/CMakeLists.txt