[libc++] Fix building the benchmarks after introducing a target for cxx-headers
authorLouis Dionne <ldionne@apple.com>
Tue, 14 Jul 2020 15:49:18 +0000 (11:49 -0400)
committerLouis Dionne <ldionne@apple.com>
Tue, 14 Jul 2020 15:50:12 +0000 (11:50 -0400)
commite1ca7a652222699d3f72cd3115ca269c1040c66e
tree6cb978f9a14b5f3df6ceaeca8f760fb3140016ca
parenta4a00ced0cf8cc5663ff0ced801d6139153f3f76
[libc++] Fix building the benchmarks after introducing a target for cxx-headers

The libc++ headers were included twice, which broke the #include_next
logic.
libcxx/benchmarks/CMakeLists.txt