sbcl: drop support for i686.
sbcl: drop support for i686.

SBCL on x86 uses modify_ldt(2), which is disabled on our x86_64
Linux 4.9 kernels, causing SBCL to crash immediately.

Dropping i686 support for the template for now, feel free to fix.
Interested users also can do a native build on a i686 machine with our
i686 kernel.

gangsterakato/void-packages,WKuipers/void-packages,coredumb/void-packages,kulinacs/void-packages,juliendehos/void-packages,gangsterakato/void-packages,necrophcodr/void-packages,gangsterakato/void-packages,jprjr/void-packages,EaterOfCode/void-packages,necrophcodr/void-packages,EaterOfCode/void-packages,ayghor/void-packages,ayghor/void-packages,WKuipers/void-packages,opsaaspo/void-packages,opsaaspo/void-packages,Bubble-be/void-packages,floGik/void-packages,WKuipers/void-packages,jprjr/void-packages,jprjr/void-packages,EaterOfCode/void-packages,juliendehos/void-packages,NeoChontrix/void-packages,floGik/void-packages,floGik/void-packages,necrophcodr/void-packages,floGik/void-packages,ayghor/void-packages,coredumb/void-packages,liwakura/void-packages,NeoChontrix/void-packages,gangsterakato/void-packages,coredumb/void-packages,kulinacs/void-packages,Bubble-be/void-packages,Bubble-be/void-packages,floGik/void-packages,WKuipers/void-packages,NeoChontrix/void-packages,jprjr/void-packages,juliendehos/void-packages,kulinacs/void-packages,liwakura/void-packages,kulinacs/void-packages,WKuipers/void-packages,Bubble-be/void-packages,juliendehos/void-packages,EaterOfCode/void-packages,NeoChontrix/void-packages,liwakura/void-packages,kulinacs/void-packages,opsaaspo/void-packages,NeoChontrix/void-packages,gangsterakato/void-packages,jprjr/void-packages,juliendehos/void-packages,WKuipers/void-packages,ayghor/void-packages,ayghor/void-packages,coredumb/void-packages,Bubble-be/void-packages,floGik/void-packages,juliendehos/void-packages,EaterOfCode/void-packages,opsaaspo/void-packages,necrophcodr/void-packages,liwakura/void-packages,coredumb/void-packages,ayghor/void-packages,kulinacs/void-packages,liwakura/void-packages,NeoChontrix/void-packages,opsaaspo/void-packages,necrophcodr/void-packages,coredumb/void-packages,liwakura/void-packages,Bubble-be/void-packages,gangsterakato/void-packages,jprjr/void-packages,opsaaspo/void-packages