Enable Legacy Builds

Enable Legacy Builds

mbed header file - mbed lib revision - 94

mbed header file - mbed lib revision - 93

Added RZ_A1H to release

API: mbed header file - mbed lib revision - 91

API: mbed header file - mbed lib revision - 90

Bumped revision number

Enabled GCC_ARM for NRF51822 targets in official build

Merge pull request ARMmbed#412 from sg-/master

[MTS_GAMBIT] Add new target support