Set the math lib in a variable

Change-Id: I1c79eade133f2d4fd29c7b6f6febcd29b0f736a4
Reviewed-on: http://review.couchbase.org/32863
Reviewed-by: Trond Norbye <trond.norbye@gmail.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>
Use CMake as the toplevel makefile

Change-Id: I139aa0f9ed0687a494b97d28026f3fbe56ffb2e8
Testing wiht a modified layout

Change-Id: Ifdb422172781644abfb3be61888f7702980989d1
try set path

Change-Id: Ib5ac1e339ba7637d88c37f30de6dfca3117ea559
Adding erlang in SingleMoudule build

Change-Id: I1a6dcd929e338a822835cc616291db990af284d3
Signed-off-by: Nimish Gupta <nimish@couchbase.com>