vold: Switch from LOG -> SLOG

Change-Id: I48ee8bd90b47f5845f069cdf4d1b8ba6ecdb1b39
Signed-off-by: San Mehat <san@google.com>
diff --git a/Xwarp.cpp b/Xwarp.cpp
index 1435a53..2973ff8 100644
--- a/Xwarp.cpp
+++ b/Xwarp.cpp
@@ -73,7 +73,7 @@
     tmp = (enable ? XWARP_BACKINGFILE : "");
 
     if (write(fd, tmp, strlen(tmp)+1) < 0) {
-        LOGE("Failed to write xwarp cfg (%s)", strerror(errno));
+        SLOGE("Failed to write xwarp cfg (%s)", strerror(errno));
         close(fd);
         return -1;
     }