middleware: added missing license file
middleware: added missing license file

JIRA: EDISON-783

added lgpl version 2.1 license file

Change-Id: Ie5d0ce0057e329719de475e1a60a0cad0ad1f643
Signed-off-by: pchenthx <ea0db43d929961e7db4a331f92abffaa996227a6@intel.com>

n054/iotkit-comm-c,intel-iot-devkit/iotkit-comm-c,intel-iot-devkit/iotkit-comm-c,n054/iotkit-comm-c