fix Makefile of all bril extern packages
fix BUILDHOME level and package name of Makefile bril extern packages according to current directory structure. As described by https://its.cern.ch/jira/browse/CMSOS-118
Edited by Zhen Xie
fix BUILDHOME level and package name of Makefile bril extern packages according to current directory structure. As described by https://its.cern.ch/jira/browse/CMSOS-118