build: don't add libraries when --enable-static

Currently when building with --enabled-static the cctest target will
include libraries to be linked regardless. This commit adds a condition
to only add the libraries when dynamically linking.

This commit re-adds the previously reverted commit (be63c26e8c
"build: don't add libraries when --enable-static"). The reason that
commit failed was a mistake on my part where I moved the the list
into a variable (thinking that it was a simple change that would not
affect anything) and not re-running CI. But the list itself contains
variables used to enable differences in operating systems/compilers
where the object file locations vary.

PR-URL: https://github.com/nodejs/node/pull/14912
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Refael Ackermann <refack@gmail.com>

node.gyp

@@ -632,6 +632,23 @@
         '<(SHARED_INTERMEDIATE_DIR)', # for node_natives.h
       ],
 
+      'defines': [ 'NODE_WANT_INTERNALS=1' ],
+
+      'sources': [
+        'src/node_platform.cc',
+        'src/node_platform.h',
+        'test/cctest/test_base64.cc',
+        'test/cctest/test_environment.cc',
+        'test/cctest/test_util.cc',
+        'test/cctest/test_url.cc'
+      ],
+
+      'sources!': [
+        'src/node_main.cc'
+      ],
+
+      'conditions': [
+        ['node_target_type!="static_library"', {
           'libraries': [
 	    '<(OBJ_GEN_PATH)<(OBJ_SEPARATOR)node_javascript.<(OBJ_SUFFIX)',
             '<(OBJ_PATH)<(OBJ_SEPARATOR)node_debug_options.<(OBJ_SUFFIX)',
@@ -651,23 +668,7 @@
             '<(OBJ_TRACING_PATH)<(OBJ_SEPARATOR)node_trace_writer.<(OBJ_SUFFIX)',
             '<(OBJ_TRACING_PATH)<(OBJ_SEPARATOR)trace_event.<(OBJ_SUFFIX)',
           ],
-
+        }],
-      'defines': [ 'NODE_WANT_INTERNALS=1' ],
-
-      'sources': [
-        'src/node_platform.cc',
-        'src/node_platform.h',
-        'test/cctest/test_base64.cc',
-        'test/cctest/test_environment.cc',
-        'test/cctest/test_util.cc',
-        'test/cctest/test_url.cc'
-      ],
-
-      'sources!': [
-        'src/node_main.cc'
-      ],
-
-      'conditions': [
         ['v8_enable_inspector==1', {
           'sources': [
             'test/cctest/test_inspector_socket.cc',