mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

targets/TARGET_Silicon_Labs/TARGET_EFM32/TARGET_EFR32MG1/TARGET_TB_SENSE_1/shortlog@289d4deac6e4: not found in manifest