Restructure native codebase

native/jni/base/Android.mk

@@ -0,0 +1,27 @@
+LOCAL_PATH := $(call my-dir)
+
+# Magisk project-wide common code
+
+include $(CLEAR_VARS)
+LOCAL_MODULE:= libbase
+LOCAL_C_INCLUDES := jni/include $(LOCAL_PATH)/include out/generated
+LOCAL_EXPORT_C_INCLUDES := $(LOCAL_C_INCLUDES)
+LOCAL_EXPORT_STATIC_LIBRARIES := libcxx
+LOCAL_STATIC_LIBRARIES := libcxx
+LOCAL_SRC_FILES := \
+    new.cpp \
+    files.cpp \
+    misc.cpp \
+    selinux.cpp \
+    logging.cpp \
+    xwrap.cpp \
+    stream.cpp
+include $(BUILD_STATIC_LIBRARY)
+
+# Workaround "hacky" libc.a missing symbols
+# To build Magisk with vanilla NDK, remove all usage of libcompat
+
+include $(CLEAR_VARS)
+LOCAL_MODULE:= libcompat
+LOCAL_SRC_FILES := compat/compat.cpp
+include $(BUILD_STATIC_LIBRARY)