Init code rearrangement

native/jni/init/early_mount.cpp

@@ -1,4 +1,3 @@
-#include <sys/mount.h>
 #include <sys/sysmacros.h>
 #include <string.h>
 #include <stdio.h>
@@ -77,6 +76,13 @@ static dev_t setup_block(const char *partname, char *block_dev = nullptr) {
 	}
 }
 
+static bool is_lnk(const char *name) {
+	struct stat st;
+	if (lstat(name, &st))
+		return false;
+	return S_ISLNK(st.st_mode);
+}
+
 bool MagiskInit::read_dt_fstab(const char *name, char *partname, char *fstype) {
 	char path[128];
 	int fd;