Disable automatic installation of chan-sccp-b_backtrace script

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4238 43c1dc8c-776e-4df2-8ef1-6e829299be21
Disable automatic installation of chan-sccp-b_backtrace script (bootstrap)

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4239 43c1dc8c-776e-4df2-8ef1-6e829299be21