Move Android ucontext.h out of third_party.

Google is re-licensing this code under the standard dual license of
compiler-rt.

llvm-svn: 204128
GitOrigin-RevId: 0b5b3295e521e266ded60099c1e067120cd2ffaa
1 file changed
tree: ef89efcab51ef149dbe7fe3f758c8751a234a490
  1. LICENSE.TXT