build: search the url for "trunk" if no root was provided by svn info
build: search the url for "trunk" if no root was provided by svn info

try to find the path by assumming an standard tree and looking
for the trunk word in the url.

this protects against obsolete versions of svn that don't report
the root path as still in use for CentOS 4


phreakocious/monitor-core,lawrencewu/monitor-core,dmourati/monitor-core,torkelsson/monitor-core,phreakocious/monitor-core,phreakocious/monitor-core,sdgdsffdsfff/monitor-core,torkelsson/monitor-core,lawrencewu/monitor-core,ganglia/monitor-core,ganglia/monitor-core,hinesmr/monitor-core,sdgdsffdsfff/monitor-core,mjzhou/monitor-core,sdgdsffdsfff/monitor-core,ganglia/monitor-core,lawrencewu/monitor-core,torkelsson/monitor-core,sdgdsffdsfff/monitor-core,hinesmr/monitor-core,fastly/monitor-core,dmourati/monitor-core,ganglia/monitor-core,ganglia/monitor-core,lawrencewu/monitor-core,mjzhou/monitor-core,ganglia/monitor-core,ganglia/monitor-core,dmourati/monitor-core,NoodlesNZ/monitor-core,lawrencewu/monitor-core,sdgdsffdsfff/monitor-core,torkelsson/monitor-core,hinesmr/monitor-core,NoodlesNZ/monitor-core,mjzhou/monitor-core,sdgdsffdsfff/monitor-core,phreakocious/monitor-core,torkelsson/monitor-core,fastly/monitor-core,dmourati/monitor-core,fastly/monitor-core,NoodlesNZ/monitor-core,mjzhou/monitor-core,phreakocious/monitor-core,mjzhou/monitor-core,lawrencewu/monitor-core,hinesmr/monitor-core,NoodlesNZ/monitor-core,phreakocious/monitor-core,torkelsson/monitor-core,dmourati/monitor-core,fastly/monitor-core,mjzhou/monitor-core,sdgdsffdsfff/monitor-core,hinesmr/monitor-core,NoodlesNZ/monitor-core,fastly/monitor-core,dmourati/monitor-core,mjzhou/monitor-core,ganglia/monitor-core,fastly/monitor-core,NoodlesNZ/monitor-core,lawrencewu/monitor-core,NoodlesNZ/monitor-core,phreakocious/monitor-core,fastly/monitor-core,torkelsson/monitor-core