baremetal: Auto-detect IAR toolchain for Renesas RL78 architecture
baremetal: Auto-detect IAR toolchain for Renesas RL78 architecture

Change-Id: I49dec9b3d33de7a1bf69c785f485e3db7baaa3d5
Reviewed-by: Richard Weickelt <320bca71fc381a4a025636043ca86e734e31cf8b@weickelt.de>
Reviewed-by: Christian Kandeler <3aa99dcdd3f0cac61fb81c2a11771c0cc2497607@qt.io>

qt-labs/qbs,qtproject/qt-labs-qbs,qtproject/qt-labs-qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qtproject/qt-labs-qbs