Example of using SD card with Mbed OS5.

Revision:
2:d08c053d5a35
Parent:
0:87642278ede6
--- a/mbed_app.json	Thu Feb 14 10:37:28 2019 +0000
+++ b/mbed_app.json	Wed Jul 17 06:07:09 2019 +0000
@@ -1,6 +1,6 @@
 {
     "target_overrides": {
-        "LPC1768": {
+        "*": {
             "target.components_add": ["SD"]
         }
     }