Starting to untangle header spaghetti.

Change-Id: I31f38d05dc8b55c659e8c7e9c0a87b94b9ac1db5
diff --git a/rsContext.cpp b/rsContext.cpp
index 0f3cea7..748b72a 100644
--- a/rsContext.cpp
+++ b/rsContext.cpp
@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 
+#include "rs.h"
 #include "rsDevice.h"
 #include "rsContext.h"
 #include "rsThreadIO.h"