gajim: include root CA cert for plugin installer
gajim: include root CA cert for plugin installer

This really should be fixed upstream: the file DST_Root_CA_X3.pem
is needed by the plugin installer for its cert pinning, but is not
installed.  This patch fixes the Makefile to do this.

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