Add missing includes.

Test: mma
Bug: None
Change-Id: I27d0860770f40b0d210277fbbf0242db450e0e0d
diff --git a/opengl/libs/EGL/BlobCache.cpp b/opengl/libs/EGL/BlobCache.cpp
index f1b30c7..0624b60 100644
--- a/opengl/libs/EGL/BlobCache.cpp
+++ b/opengl/libs/EGL/BlobCache.cpp
@@ -18,6 +18,7 @@
 
 #include "BlobCache.h"
 
+#include <errno.h>
 #include <inttypes.h>
 
 #include <cutils/properties.h>