build: CMake refactoring

Includes:
- refactor build_lib and build_lib_example macros
    - unify src and contrib macros
    - replace macro with function not to leak definitions
    - parse list of arguments
- different cmake-format file for modules to list one item per line

src/csma-layout/CMakeLists.txt

@@ -1,15 +1,10 @@
-set(name csma-layout)
-
-set(source_files model/csma-star-helper.cc)
-
-set(header_files model/csma-star-helper.h)
-
-set(libraries_to_link ${libnetwork} ${libinternet} ${libcsma}
-                      ${libpoint-to-point}
-)
-
-set(test_sources)
-
-build_lib("${name}" "${source_files}" "${header_files}" "${libraries_to_link}"
-          "${test_sources}"
+build_lib(
+  LIBNAME csma-layout
+  SOURCE_FILES model/csma-star-helper.cc
+  HEADER_FILES model/csma-star-helper.h
+  LIBRARIES_TO_LINK
+    ${libnetwork}
+    ${libinternet}
+    ${libcsma}
+    ${libpoint-to-point}
 )

src/csma-layout/examples/CMakeLists.txt

@@ -1,9 +1,9 @@
-set(name csma-star)
-set(source_files ${name}.cc)
-set(header_files)
-set(libraries_to_link ${libcsma} ${libcsma-layout} ${libinternet}
-                      ${libapplications}
-)
 build_lib_example(
-  "${name}" "${source_files}" "${header_files}" "${libraries_to_link}"
+  NAME csma-star
+  SOURCE_FILES csma-star.cc
+  LIBRARIES_TO_LINK
+    ${libcsma}
+    ${libcsma-layout}
+    ${libinternet}
+    ${libapplications}
 )