aapt: move qsort_r_compat here as it is sole client

This code is only used on the host for MacOS X compatibility.
Apparently, glibc and Apple's libc disagree on the parameter
ordering.

Change-Id: I214edcf2870b6ac88316306ac5af43f1dadf9b2e
Signed-off-by: Dima Zavin <dima@android.com>
diff --git a/tools/aapt/StringPool.cpp b/tools/aapt/StringPool.cpp
index 839eda5..158b391 100644
--- a/tools/aapt/StringPool.cpp
+++ b/tools/aapt/StringPool.cpp
@@ -9,7 +9,7 @@
 
 #include <utils/ByteOrder.h>
 #include <utils/SortedVector.h>
-#include <cutils/qsort_r_compat.h>
+#include "qsort_r_compat.h"
 
 #if HAVE_PRINTF_ZD
 #  define ZD "%zd"