Add Makefile with default arguments for ndk-build

Makefile

@@ -0,0 +1,17 @@
+
+ANDROID_NDK_ROOT?=~/android-ndk
+TARGET_ARCH_ABI?=armeabi-v7a
+LOCAL_ARM_NEON?=true
+
+# Set to yes to include support for output to OpenSL
+POST_FROYO?=yes
+
+default: lib
+
+lib:
+	(cd jni; \
+		TARGET_ARCH_ABI=$(TARGET_ARCH_ABI) \
+		LOCAL_ARM_NEON=$(LOCAL_ARM_NEON) \
+		ANDROID_NDK_ROOT=$(ANDROID_NDK_ROOT) \
+		POST_FROYO=$(POST_FROYO) \
+		$(ANDROID_NDK_ROOT)/ndk-build;)