Added implementing_a_function.rst providing a checklist for adding a new function to LLVM-libc. Updated dev/index.rst to include the new guide in the toctree.
LLVM libc ========= This directory and its subdirectories contain source code for llvm-libc, a retargetable implementation of the C standard library. LLVM is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt.