Adding libssl-dev dependency and making ROS_VERSION optional (#1)

* Update package.xml

* Update package.xml

* Update CMakeLists.txt

Author: AAlon

aws_common/CMakeLists.txt

@@ -9,6 +9,8 @@ if (DEFINED ENV{ROS_DISTRO})
 endif()
 if (DEFINED ENV{ROS_VERSION})
     add_definitions(-DCMAKE_ROS_VERSION="$ENV{ROS_VERSION}")
+else()
+    add_definitions(-DCMAKE_ROS_VERSION="1")
 endif()
 
 if(NOT EXTERNAL_INSTALL_LOCATION)

aws_common/package.xml

@@ -15,6 +15,7 @@
   <depend>zlib</depend>
   <depend>uuid</depend>
   <depend>curl</depend>
+  <depend>libssl-dev</depend>
 
   <test_depend>gtest</test_depend>
   <export>