Restructure the native module

Consolidate all code into the src folder

native/src/base/Android.mk

@@ -0,0 +1,32 @@
+LOCAL_PATH := $(call my-dir)
+
+# Magisk project-wide common code
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := libbase
+LOCAL_C_INCLUDES := src/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 \
+    ../external/cxx-rs/src/cxx.cc
+include $(BUILD_STATIC_LIBRARY)
+
+# All static executables should link with libcompat
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := libcompat
+# Workaround "hacky" libc.a missing symbols
+# To build Magisk with vanilla NDK, comment out the next line
+LOCAL_SRC_FILES := compat/compat.cpp
+# Fix static variables' ctor/dtor when using LTO
+# See: https://github.com/android/ndk/issues/1461
+LOCAL_EXPORT_LDLIBS := -static -T src/lto_fix.lds
+include $(BUILD_STATIC_LIBRARY)