[cmake] [libcxxabi] Fix find_path() problems when cross compiling

When CMAKE_SYSROOT or CMAKE_FIND_ROOT_PATH is set, cmake
recommends setting CMAKE_FIND_ROOT_PATH_MODE_INCLUDE=ONLY
globally which means find_path() always prepends CMAKE_SYSROOT or
CMAKE_FIND_ROOT_PATH to all paths used in the search.

However, these find_path() invocations are looking for paths in
the libcxx and libunwind projects on the host system, not the
target system, which can be done by passing
NO_CMAKE_FIND_ROOT_PATH.

Differential Revision: https://reviews.llvm.org/D41623

git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@323145 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed