Changed pkg_config templates to use the library variable name instead of being hard-coded

Author: Alexander Damian

packaging/cassandra.pc.in

@@ -6,6 +6,6 @@ includedir=@includedir@
 Name: cassandra
 Description: A C/C++ client driver for Apache Cassandra
 Version: @version@
-Libs: -L${libdir} -lcassandra
+Libs: -L${libdir} -l@PROJECT_LIB_NAME@
 Cflags:
 URL: https://github.com/datastax/cpp-driver/

packaging/cassandra_static.pc.in

@@ -7,6 +7,6 @@ Name: cassandra
 Description: A C/C++ client driver for Apache Cassandra
 Version: @version@
 Requires: libuv
-Libs: -L${libdir} -lcassandra_static -lstdc++
+Libs: -L${libdir} -l@PROJECT_LIB_NAME_STATIC@ -lstdc++
 Cflags:
 URL: https://github.com/datastax/cpp-driver/