Added my Android build files to iphone branch, added #ifdef ANDROID and fixed some missed includes in sources

build/Android/project/jni/sdl/Android.mk

@@ -0,0 +1,37 @@
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := sdl
+
+LOCAL_CFLAGS := -I$(LOCAL_PATH)/include
+
+SDL_SRCS := \
+	src/*.c \
+	src/audio/*.c \
+	src/cdrom/*.c \
+	src/cpuinfo/*.c \
+	src/events/*.c \
+	src/file/*.c \
+	src/joystick/*.c \
+	src/stdlib/*.c \
+	src/thread/*.c \
+	src/timer/*.c \
+	src/video/*.c \
+	src/audio/dummy/*.c \
+	src/video/android/*.c \
+	src/joystick/dummy/*.c \
+	src/cdrom/dummy/*.c \
+	src/thread/pthread/*.c \
+	src/timer/unix/*.c \
+	src/loadso/dummy/*.c \
+
+LOCAL_CPP_EXTENSION := .cpp
+
+# Note this simple makefile var substitution, you can find even simpler examples in different Android projects
+LOCAL_SRC_FILES := $(foreach F, $(SDL_SRCS), $(addprefix $(dir $(F)),$(notdir $(wildcard $(LOCAL_PATH)/$(F)))))
+
+LOCAL_LDLIBS := -lGLESv1_CM -ldl -llog
+
+include $(BUILD_STATIC_LIBRARY)
+