Replaces a use of wc.exe in resources\install\build.xml with the length Ant task as suggested by Damian Minkov.
Replaces a use of wc.exe in resources\install\build.xml with the length Ant task as suggested by Damian Minkov.

level7systems/jitsi,damencho/jitsi,pplatek/jitsi,HelioGuilherme66/jitsi,bebo/jitsi,level7systems/jitsi,cobratbq/jitsi,bhatvv/jitsi,bebo/jitsi,iant-gmbh/jitsi,damencho/jitsi,HelioGuilherme66/jitsi,marclaporte/jitsi,dkcreinoso/jitsi,gpolitis/jitsi,ringdna/jitsi,jitsi/jitsi,Metaswitch/jitsi,marclaporte/jitsi,jitsi/jitsi,mckayclarey/jitsi,pplatek/jitsi,459below/jitsi,level7systems/jitsi,tuijldert/jitsi,martin7890/jitsi,bhatvv/jitsi,HelioGuilherme66/jitsi,iant-gmbh/jitsi,level7systems/jitsi,mckayclarey/jitsi,ringdna/jitsi,ibauersachs/jitsi,pplatek/jitsi,damencho/jitsi,Metaswitch/jitsi,gpolitis/jitsi,cobratbq/jitsi,bhatvv/jitsi,pplatek/jitsi,laborautonomo/jitsi,dkcreinoso/jitsi,jitsi/jitsi,ibauersachs/jitsi,ibauersachs/jitsi,procandi/jitsi,bhatvv/jitsi,laborautonomo/jitsi,tuijldert/jitsi,ringdna/jitsi,iant-gmbh/jitsi,ringdna/jitsi,jibaro/jitsi,ibauersachs/jitsi,HelioGuilherme66/jitsi,marclaporte/jitsi,jibaro/jitsi,jibaro/jitsi,marclaporte/jitsi,mckayclarey/jitsi,Metaswitch/jitsi,cobratbq/jitsi,iant-gmbh/jitsi,cobratbq/jitsi,bebo/jitsi,marclaporte/jitsi,tuijldert/jitsi,martin7890/jitsi,laborautonomo/jitsi,procandi/jitsi,martin7890/jitsi,bhatvv/jitsi,procandi/jitsi,ibauersachs/jitsi,tuijldert/jitsi,damencho/jitsi,459below/jitsi,laborautonomo/jitsi,jitsi/jitsi,dkcreinoso/jitsi,mckayclarey/jitsi,bebo/jitsi,gpolitis/jitsi,procandi/jitsi,jibaro/jitsi,laborautonomo/jitsi,gpolitis/jitsi,jitsi/jitsi,tuijldert/jitsi,dkcreinoso/jitsi,jibaro/jitsi,ringdna/jitsi,mckayclarey/jitsi,cobratbq/jitsi,martin7890/jitsi,HelioGuilherme66/jitsi,pplatek/jitsi,procandi/jitsi,dkcreinoso/jitsi,iant-gmbh/jitsi,459below/jitsi,459below/jitsi,459below/jitsi,gpolitis/jitsi,level7systems/jitsi,martin7890/jitsi,bebo/jitsi,damencho/jitsi,Metaswitch/jitsi