deletet unnecessary output "\n"

Output looked like this:

root@htpc:/etc/munin/plugins# ./nvidia_gpu_mem
mem0.value 0\n
Merge pull request #255 from CWempe/patch-2

deletet unnecessary output "\n"
add a profiler for munin-node
Merge remote branch 'helmut/profile'
mpc: optimize HZ retrieval

As Brian De Wolf noted:

hz only really needs to be calculated once, so this line could be
moved up out of the loop, resulting in a likely unnoticeable
performance increase. :)
munin-profile-node.py: hanlde multiple connections
Merge remote branch 'helmut/profile'