style: Add a control character checker
style: Add a control character checker

Add a style checker that verifies that source code doesn't contain
non-printable (control) characters. The only allowed control
characters are:

  * 0x0a / \n: New line
  * 0x09 / \t: Tab (the whitespace checker enforces no-tabs for C/C++ files)

Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Brandon Potter <brandon.potter@amd.com>

--HG--
extra : rebase_source : 9ba3e2971774a7b3d73cda34bbee1f19c4add746

gedare/gem5,HwisooSo/gemV-update,TUD-OS/gem5-dtu,gem5/gem5,rjschof/gem5,sobercoder/gem5,TUD-OS/gem5-dtu,HwisooSo/gemV-update,gem5/gem5,cancro7/gem5,Weil0ng/gem5,HwisooSo/gemV-update,SanchayanMaity/gem5,rjschof/gem5,aclifton/cpeg853-gem5,HwisooSo/gemV-update,SanchayanMaity/gem5,gedare/gem5,cancro7/gem5,KuroeKurose/gem5,rallylee/gem5,TUD-OS/gem5-dtu,briancoutinho0905/2dsampling,sobercoder/gem5,aclifton/cpeg853-gem5,gedare/gem5,Weil0ng/gem5,aclifton/cpeg853-gem5,qizenguf/MLC-STT,powerjg/gem5-ci-test,KuroeKurose/gem5,rjschof/gem5,KuroeKurose/gem5,briancoutinho0905/2dsampling,cancro7/gem5,gedare/gem5,SanchayanMaity/gem5,Weil0ng/gem5,rjschof/gem5,rallylee/gem5,KuroeKurose/gem5,powerjg/gem5-ci-test,gedare/gem5,rjschof/gem5,qizenguf/MLC-STT,HwisooSo/gemV-update,aclifton/cpeg853-gem5,cancro7/gem5,rallylee/gem5,qizenguf/MLC-STT,TUD-OS/gem5-dtu,KuroeKurose/gem5,SanchayanMaity/gem5,TUD-OS/gem5-dtu,briancoutinho0905/2dsampling,KuroeKurose/gem5,cancro7/gem5,sobercoder/gem5,aclifton/cpeg853-gem5,powerjg/gem5-ci-test,sobercoder/gem5,cancro7/gem5,TUD-OS/gem5-dtu,sobercoder/gem5,gedare/gem5,cancro7/gem5,HwisooSo/gemV-update,KuroeKurose/gem5,gem5/gem5,briancoutinho0905/2dsampling,Weil0ng/gem5,qizenguf/MLC-STT,sobercoder/gem5,rallylee/gem5,rjschof/gem5,powerjg/gem5-ci-test,qizenguf/MLC-STT,powerjg/gem5-ci-test,gedare/gem5,gem5/gem5,SanchayanMaity/gem5,Weil0ng/gem5,aclifton/cpeg853-gem5,powerjg/gem5-ci-test,Weil0ng/gem5,qizenguf/MLC-STT,rjschof/gem5,SanchayanMaity/gem5,gem5/gem5,powerjg/gem5-ci-test,Weil0ng/gem5,briancoutinho0905/2dsampling,sobercoder/gem5,gem5/gem5,aclifton/cpeg853-gem5,briancoutinho0905/2dsampling,rallylee/gem5,SanchayanMaity/gem5,rallylee/gem5,TUD-OS/gem5-dtu,rallylee/gem5,gem5/gem5,qizenguf/MLC-STT,briancoutinho0905/2dsampling,HwisooSo/gemV-update