Yuki Abe / Mbed 2 deprecated SDcardSpeedTest

Make sure the speed of writing to microSD.

Dependencies:   SDFileSystem mbed

Diff: SDFileSystem.lib

Revision:
0:b179d330bb2e
diff -r 000000000000 -r b179d330bb2e SDFileSystem.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SDFileSystem.lib	Tue May 30 04:56:42 2017 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/SDFileSystem/#c8f66dc765d4