Move dynlink.h to include/android/

+ Move dynlink-static.c to android/
+ Move loadpng.c to android/
+ Move linux_keycodes.h to android/

Change-Id: Ibaede71e37223e86393cecc5bc86ac97ea1c97e6
diff --git a/Makefile.common b/Makefile.common
index 08e62f4..c112693 100644
--- a/Makefile.common
+++ b/Makefile.common
@@ -180,7 +180,7 @@
     $(LIBPNG_CFLAGS) \
     -I$(LOCAL_PATH)/$(LIBPNG_DIR)
 
-common_LOCAL_SRC_FILES += $(LIBPNG_SOURCES) loadpng.c
+common_LOCAL_SRC_FILES += $(LIBPNG_SOURCES) android/loadpng.c
 
 ##############################################################################
 # SDL-related definitions