Add missing include to fix libc++ build.
This was previously committed, but I guess it got lost in the merge
queue.
Bug: 15193147
Change-Id: Ic0e5d90ab403fb833d6a3bb7c55d279c56534869
diff --git a/libs/gui/tests/SRGB_test.cpp b/libs/gui/tests/SRGB_test.cpp
index 2d5b8aa..da2add7 100644
--- a/libs/gui/tests/SRGB_test.cpp
+++ b/libs/gui/tests/SRGB_test.cpp
@@ -19,6 +19,8 @@
#include "GLTest.h"
+#include <math.h>
+
#include <gui/CpuConsumer.h>
#include <gui/Surface.h>
#include <gui/SurfaceComposerClient.h>