Always #include <sys/...>, not <linux/...>.

(cherry picked from commit faf7d62bbbe8529a7558ddd72ba4a8960298e33f)

Change-Id: I8c7f4b31ac828eb9cdb698e38a04256b8c3fc88c
diff --git a/src/utils/os_unix.c b/src/utils/os_unix.c
index d3860ae..7498967 100644
--- a/src/utils/os_unix.c
+++ b/src/utils/os_unix.c
@@ -12,7 +12,7 @@
 
 #ifdef ANDROID
 #include <sys/capability.h>
-#include <linux/prctl.h>
+#include <sys/prctl.h>
 #include <private/android_filesystem_config.h>
 #endif /* ANDROID */