germline failed to build from the github

[superbsky]

...
g++ impute_to_ped.cpp -o bin/impute_to_ped
/usr/bin/ld: cannot open output file bin/impute_to_ped: No such file or directory
collect2: error: ld returned 1 exit status
Makefile:16: recipe for target 'impute_to_ped' failed
make: *** [impute_to_ped] Error 1

it is easy to fix by creating an output a bin folder mkdir bin.

This issue was found while using the official version from the http://gusevlab.org/projects/germline/release/germline-1-5-3.tar.gz where impute_to_ped returns error code = 1 even if everything went well.