CMake: Turned off Mac OS X rpath warning kludge. Apparently CMake errors out if it doesn't know this policy, and we don't otherwise require CMake 3.0 yet. Sigh.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d4620c6..70c28bd 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -13,7 +13,7 @@ project(SDL2 C)
# !!! FIXME: properly resolved, this line silences a warning in CMake 3.0+.
# !!! FIXME: remove it and this comment entirely once the problem is
# !!! FIXME: properly resolved.
-cmake_policy(SET CMP0042 OLD)
+#cmake_policy(SET CMP0042 OLD)
include(CheckFunctionExists)
include(CheckLibraryExists)