baremetal: Add additional filter '*-gcc-[1-9]*' string
baremetal: Add additional filter '*-gcc-[1-9]*' string

... that allow to auto-detect the GCC toolchains with
names like 'avr-gcc-5.4.0' and so forth.

Change-Id: I004f68b8aeb2a17124cfd53d3643584dc6aa1bc6
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,qt-labs/qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qtproject/qt-labs-qbs,qtproject/qt-labs-qbs