test: annotate intentional static-analysis guards

tests/test_file.c

@@ -138,6 +138,7 @@ static void test_to_disk_does_not_follow_symlink() {
   FILE* fp = fopen(outside, "rb");
   char buf[16] = {0};
   EXPECT_NOT_NULL(fp);
+  // cppcheck-suppress knownConditionTrueFalse
   if (!fp)
     return;
   size_t read_count = fread(buf, 1, sizeof(buf) - 1, fp);

tests/test_multiprocessing.c

@@ -91,7 +91,9 @@ static void test_sender_zero_capacity() {
   cfg->send_directory = str_dup("/src");
   cfg->receive_root_directory = str_dup("/dst");
 
+  // cppcheck-suppress constVariablePointer
   Queue* const q1 = queue_create(0, NULL);
+  // cppcheck-suppress constVariablePointer
   Queue* const q2 = queue_create(0, NULL);
   EXPECT_NULL(q1);
   EXPECT_NULL(q2);