Fix fread_EOF test name.

Change-Id: I53a7f1428fd27c0b2a5c80f2e8af4845d17f5b4b
diff --git a/tests/stdio_test.cpp b/tests/stdio_test.cpp
index 6d7e72b..d32d0b8 100644
--- a/tests/stdio_test.cpp
+++ b/tests/stdio_test.cpp
@@ -889,7 +889,7 @@
   }
 }
 
-TEST(fread, fread_EOF) {
+TEST(stdio, fread_EOF) {
   const char* digits = "0123456789";
   FILE* fp = fmemopen((char*) digits, sizeof(digits), "r");