native frameworks: 64-bit compile issues

- Fix format (print/scanf)
- Suppress unused argument warning messages (bonus)

Change-Id: I05c7724d2aba6da1e82a86000e11f3a8fef4e728
diff --git a/services/surfaceflinger/DisplayHardware/FramebufferSurface.cpp b/services/surfaceflinger/DisplayHardware/FramebufferSurface.cpp
index 8c634ed..7d4b196 100644
--- a/services/surfaceflinger/DisplayHardware/FramebufferSurface.cpp
+++ b/services/surfaceflinger/DisplayHardware/FramebufferSurface.cpp
@@ -72,7 +72,7 @@
     return NO_ERROR;
 }
 
-status_t FramebufferSurface::prepareFrame(CompositionType compositionType) {
+status_t FramebufferSurface::prepareFrame(CompositionType /*compositionType*/) {
     return NO_ERROR;
 }