Add name for typedef

hardware/libhardware/include was being included with -isystem, which
hides warnings.  Add the missing name for a typedef.

Bug: 32018017
Test: m -j
Change-Id: I35f950ba3e26836cb51312ef28e98748f29d8cd8
diff --git a/include/hardware/camera2.h b/include/hardware/camera2.h
index 2b7add0..547a1d7 100644
--- a/include/hardware/camera2.h
+++ b/include/hardware/camera2.h
@@ -146,7 +146,7 @@
 typedef struct camera2_jpeg_blob {
     uint16_t jpeg_blob_id;
     uint32_t jpeg_size;
-};
+} camera2_jpeg_blob_t;
 
 enum {
     CAMERA2_JPEG_BLOB_ID = 0x00FF