Cleanup Whitespace in unittest/ directory

Cleanup unnecessary whitespace at the end of lines and end of files
in the unittest/ directory. Note that all code changes are
non-functional.

All new code of the whole pull request, including one or several files
that are either new files or modified ones, are contributed under the
BSD-new license. I am contributing on behalf of my employer Amazon Web
Services, Inc.

unittest/examples/simple-t.c

@@ -50,4 +50,3 @@ int main() {
   ok(failed == 0, "Testing gcs()");
   return exit_status();
 }
-

unittest/mysys/CMakeLists.txt

@@ -25,4 +25,3 @@ MY_ADD_TESTS(ma_dyncol LINK_LIBRARIES  mysys)
 IF(WIN32)
   MY_ADD_TESTS(my_delete LINK_LIBRARIES mysys)
 ENDIF()
-

unittest/mysys/dynstring-t.c

@@ -71,4 +71,3 @@ int main(void)
 
   return exit_status();
 }
-

unittest/mysys/lf-t.c

@@ -196,4 +196,3 @@ void do_tests()
   lf_hash_destroy(&lf_hash);
   lf_alloc_destroy(&lf_allocator);
 }
-

unittest/mysys/my_delete-t.c

@@ -54,4 +54,3 @@ int main(int argc __attribute__((unused)),char *argv[])
   my_end(0);
   return exit_status();
 }
-

unittest/mysys/my_malloc-t.c

@@ -41,4 +41,3 @@ int main(int argc __attribute__((unused)),char *argv[])
   my_end(0);
   return exit_status();
 }
-

unittest/mysys/my_rdtsc-t.c

@@ -227,4 +227,3 @@ int main(int argc __attribute__((unused)),
 
   return 0;
 }
-

unittest/mysys/my_vsnprintf-t.c

@@ -211,4 +211,3 @@ int main(void)
 
   return exit_status();
 }
-

unittest/mysys/queues-t.c

@@ -136,4 +136,3 @@ int main(int argc __attribute__((unused)), char *argv[])
   my_end(0);
   return exit_status();
 }
-

unittest/mysys/thr_template.c

@@ -70,4 +70,3 @@ int main(int argc __attribute__((unused)), char **argv)
   my_end(0);
   return exit_status();
 }
-

unittest/mysys/waiting_threads-t.c

@@ -283,4 +283,3 @@ void do_tests()
   pthread_cond_destroy(&thread_sync);
   DBUG_VOID_RETURN;
 }
-

unittest/sql/explain_filename-t.cc

@@ -163,4 +163,3 @@ int main(int argc __attribute__((unused)),char *argv[])
   my_end(0);
   return exit_status();
 }
-

unittest/sql/my_apc-t.cc

@@ -226,4 +226,3 @@ int main(int args, char **argv)
   ok1(!have_errors);
   return exit_status();
 }
-

unittest/sql/my_json_writer-t.cc

@@ -143,4 +143,3 @@ int main(int args, char **argv)
 
   return exit_status();
 }
-

unittest/strings/CMakeLists.txt

@@ -1,3 +1,2 @@
 
 MY_ADD_TESTS(strings json LINK_LIBRARIES strings mysys)
-