build: Remove lib prefix from test module

build-support/custom-modules/ns3-configtable.cmake

@@ -202,8 +202,8 @@ macro(write_configtable)
 
   set(really-enabled-modules ${ns3-libs};${ns3-contrib-libs})
   if(${ENABLE_TESTS})
-    list(APPEND really-enabled-modules libtest) # test is an object library and
-                                                # is treated differently
+    list(APPEND really-enabled-modules test) # test is an object library and
+    # is treated differently
   endif()
   if(really-enabled-modules)
     print_formatted_table_with_modules(

src/test/CMakeLists.txt

@@ -89,7 +89,7 @@ if(traffic-control
 endif()
 
 add_library(
-  ${libtest}
+  test
   OBJECT
   ${PROJECT_SOURCE_DIR}/build-support/empty.cc # empty source file if only
   # libcore is enabled