system/core Replace log/log.h with android/log.h

Should use android/log.h instead of log/log.h as a good example
to all others.  Adjust header order to comply with Android Coding
standards.

Test: Compile
Bug: 26552300
Bug: 31289077
Change-Id: I33a8fb4e754d2dc4754d335660c450e0a67190fc

libdiskconfig/diskutils.c

diff --git a/libdiskconfig/diskutils.c b/libdiskconfig/diskutils.c
index 5d0ee62..3a27601 100644
--- a/libdiskconfig/diskutils.c
+++ b/libdiskconfig/diskutils.c
@@ -23,10 +23,10 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <unistd.h>
 #include <sys/stat.h>
+#include <unistd.h>
 
-#include <log/log.h>
+#include <android/log.h>
 
 #include <diskconfig/diskconfig.h>