Summary:
See https://github.com/facebook/react-native/issues/14326 for the bug
this fixes. This is a pretty ugly hack to work around what I think is
a CP bug. Since the C++ dependencies are only needed to build RN
itself, and not applications, don't the conflicting headers as source
files. Instead, use preserve_paths to get them unpacked into the
source tree under Pods/<Pod>, and arrange for them to get used with
HEADER_SEARCH_PATHS. This keeps them out of the project, so they
don't get included in the header map, and other (badly structured)
projects don't get confused.
Reviewed By: javache
Differential Revision: D5254716
fbshipit-source-id: cf33dcbcc71b5247843650c33ccf4fb08378e584
f3f44eee59