uvision5 - get_toolchain method
uvision5 - get_toolchain method

same solution as in PR #1687 but for Keil v5

theotherjimmy/mbed,svastm/mbed,bcostm/mbed-os,betzw/mbed-os,svogl/mbed-os,cvtsi2sd/mbed-os,CalSol/mbed,HeadsUpDisplayInc/mbed,tung7970/mbed-os,fahhem/mbed-os,kjbracey-arm/mbed,RonEld/mbed,adustm/mbed,fvincenzo/mbed-os,andcor02/mbed-os,karsev/mbed-os,bikeNomad/mbed,fanghuaqi/mbed,Shengliang/mbed,screamerbg/mbed,mbedmicro/mbed,maximmbed/mbed,RonEld/mbed,c1728p9/mbed-os,j-greffe/mbed-os,dbestm/mbed,fanghuaqi/mbed,cvtsi2sd/mbed-os,monkiineko/mbed-os,tung7970/mbed-os-1,svogl/mbed-os,pradeep-gr/mbed-os5-onsemi,c1728p9/mbed-os,dbestm/mbed,infinnovation/mbed-os,Shengliang/mbed,infinnovation/mbed-os,bikeNomad/mbed,mmorenobarm/mbed-os,c1728p9/mbed-os,c1728p9/mbed-os,geky/mbed,ryankurte/mbed-os,maximmbed/mbed,mmorenobarm/mbed-os,mmorenobarm/mbed-os,theotherjimmy/mbed,adustm/mbed,monkiineko/mbed-os,arostm/mbed-os,screamerbg/mbed,mazimkhan/mbed-os,kjbracey-arm/mbed,monkiineko/mbed-os,bikeNomad/mbed,fahhem/mbed-os,bcostm/mbed-os,nvlsianpu/mbed,mikaleppanen/mbed-os,ryankurte/mbed-os,pradeep-gr/mbed-os5-onsemi,Archcady/mbed-os,pradeep-gr/mbed-os5-onsemi,ARM-software/mbed-beetle,jeremybrodt/mbed,j-greffe/mbed-os,mbedmicro/mbed,nRFMesh/mbed-os,infinnovation/mbed-os,pradeep-gr/mbed-os5-onsemi,geky/mbed,RonEld/mbed,tung7970/mbed-os-1,cvtsi2sd/mbed-os,infinnovation/mbed-os,radhika-raghavendran/mbed-os5.1-onsemi,betzw/mbed-os,fanghuaqi/mbed,nvlsianpu/mbed,CalSol/mbed,catiedev/mbed-os,fvincenzo/mbed-os,karsev/mbed-os,karsev/mbed-os,jeremybrodt/mbed,cvtsi2sd/mbed-os,screamerbg/mbed,radhika-raghavendran/mbed-os5.1-onsemi,betzw/mbed-os,NXPmicro/mbed,fahhem/mbed-os,tung7970/mbed-os-1,dbestm/mbed,netzimme/mbed-os,Archcady/mbed-os,karsev/mbed-os,YarivCol/mbed-os,bulislaw/mbed-os,netzimme/mbed-os,jeremybrodt/mbed,fahhem/mbed-os,monkiineko/mbed-os,arostm/mbed-os,ryankurte/mbed-os,mikaleppanen/mbed-os,karsev/mbed-os,mikaleppanen/mbed-os,ARM-software/mbed-beetle,rgrover/mbed,adustm/mbed,mazimkhan/mbed-os,monkiineko/mbed-os,fanghuaqi/mbed,jeremybrodt/mbed,bikeNomad/mbed,rgrover/mbed,NXPmicro/mbed,kl-cruz/mbed-os,bulislaw/mbed-os,andreaslarssonublox/mbed,j-greffe/mbed-os,adustm/mbed,ryankurte/mbed-os,NXPmicro/mbed,fahhem/mbed-os,adamgreen/mbed,kl-cruz/mbed-os,adustm/mbed,Archcady/mbed-os,andreaslarssonublox/mbed,bikeNomad/mbed,HeadsUpDisplayInc/mbed,nRFMesh/mbed-os,ARM-software/mbed-beetle,screamerbg/mbed,kl-cruz/mbed-os,svastm/mbed,radhika-raghavendran/mbed-os5.1-onsemi,svastm/mbed,NXPmicro/mbed,betzw/mbed-os,nRFMesh/mbed-os,radhika-raghavendran/mbed-os5.1-onsemi,maximmbed/mbed,mmorenobarm/mbed-os,mikaleppanen/mbed-os,monkiineko/mbed-os,mbedmicro/mbed,arostm/mbed-os,tung7970/mbed-os-1,betzw/mbed-os,ryankurte/mbed-os,mazimkhan/mbed-os,DanKupiniak/mbed,mikaleppanen/mbed-os,HeadsUpDisplayInc/mbed,nvlsianpu/mbed,CalSol/mbed,RonEld/mbed,tung7970/mbed-os,DanKupiniak/mbed,theotherjimmy/mbed,screamerbg/mbed,jeremybrodt/mbed,j-greffe/mbed-os,rgrover/mbed,Shengliang/mbed,catiedev/mbed-os,maximmbed/mbed,netzimme/mbed-os,nRFMesh/mbed-os,andreaslarssonublox/mbed,catiedev/mbed-os,maximmbed/mbed,andcor02/mbed-os,andcor02/mbed-os,geky/mbed,fahhem/mbed-os,mikaleppanen/mbed-os,svogl/mbed-os,Archcady/mbed-os,catiedev/mbed-os,mmorenobarm/mbed-os,bcostm/mbed-os,j-greffe/mbed-os,dbestm/mbed,adamgreen/mbed,RonEld/mbed,DanKupiniak/mbed,YarivCol/mbed-os,Shengliang/mbed,nRFMesh/mbed-os,Archcady/mbed-os,fvincenzo/mbed-os,YarivCol/mbed-os,kjbracey-arm/mbed,infinnovation/mbed-os,kl-cruz/mbed-os,arostm/mbed-os,c1728p9/mbed-os,andreaslarssonublox/mbed,CalSol/mbed,radhika-raghavendran/mbed-os5.1-onsemi,catiedev/mbed-os,bulislaw/mbed-os,infinnovation/mbed-os,nvlsianpu/mbed,nvlsianpu/mbed,cvtsi2sd/mbed-os,screamerbg/mbed,cvtsi2sd/mbed-os,geky/mbed,netzimme/mbed-os,geky/mbed,tung7970/mbed-os,YarivCol/mbed-os,bcostm/mbed-os,ARM-software/mbed-beetle,Shengliang/mbed,tung7970/mbed-os,YarivCol/mbed-os,mazimkhan/mbed-os,rgrover/mbed,NXPmicro/mbed,netzimme/mbed-os,bcostm/mbed-os,YarivCol/mbed-os,maximmbed/mbed,fanghuaqi/mbed,CalSol/mbed,RonEld/mbed,bcostm/mbed-os,kl-cruz/mbed-os,nvlsianpu/mbed,karsev/mbed-os,bulislaw/mbed-os,mmorenobarm/mbed-os,ryankurte/mbed-os,theotherjimmy/mbed,j-greffe/mbed-os,dbestm/mbed,HeadsUpDisplayInc/mbed,Archcady/mbed-os,rgrover/mbed,dbestm/mbed,kl-cruz/mbed-os,tung7970/mbed-os,DanKupiniak/mbed,svogl/mbed-os,arostm/mbed-os,svogl/mbed-os,bulislaw/mbed-os,pradeep-gr/mbed-os5-onsemi,netzimme/mbed-os,mbedmicro/mbed,HeadsUpDisplayInc/mbed,arostm/mbed-os,CalSol/mbed,kjbracey-arm/mbed,fvincenzo/mbed-os,adustm/mbed,mbedmicro/mbed,theotherjimmy/mbed,mazimkhan/mbed-os,pradeep-gr/mbed-os5-onsemi,nRFMesh/mbed-os,HeadsUpDisplayInc/mbed,betzw/mbed-os,andreaslarssonublox/mbed,svastm/mbed,tung7970/mbed-os-1,NXPmicro/mbed,svastm/mbed,fvincenzo/mbed-os,bulislaw/mbed-os,adamgreen/mbed,andcor02/mbed-os,andcor02/mbed-os,andcor02/mbed-os,theotherjimmy/mbed,svogl/mbed-os,adamgreen/mbed,catiedev/mbed-os,adamgreen/mbed,mazimkhan/mbed-os,Shengliang/mbed,radhika-raghavendran/mbed-os5.1-onsemi,c1728p9/mbed-os,adamgreen/mbed