Make -j may not work

[João Carreira]

Due to dependency on local .a not specified.

Example, in src/server:

g++ -Wall -Wextra -ansi -fPIC -std=c++1z -pthread  -o bladepoolmain bladepoolmain-bladepoolmain.o -L. -lserver -lrdmacm -libverbs -L../authentication/ -lauthentication -L../utils/ -lutils -L../common/ -lcommon 
/usr/bin/ld: cannot find -lserver
collect2: error: ld returned 1 exit status
make: *** [bladepoolmain] Error 1
make: *** Waiting for unfinished jobs....
/usr/bin/ld: cannot find -lserver
collect2: error: ld returned 1 exit status
make: *** [allocmain] Error 1