-mx32 is not supported in gcc 4.6.x. change to use if-else sizeof(void*) in test code

tests/project.yml

@@ -42,7 +42,8 @@
   #  1) remove the trailing [] from the :common: section
   #  2) add entries to the :common: section (e.g. :test: has TEST defined)
   :commmon: &common_defines 
-    - MCU=MCU_LPC43XX -std=gnu99 -mx32
+    - MCU=MCU_LPC43XX -std=gnu99 
+#    - -mx32
     - CORE_M4
     - __CODE_RED
     - _TINY_USB_SOURCE_FILE_

tests/test/host/ehci/test_ehci_structure.c

@@ -98,9 +98,13 @@ void test_struct_alignment(void)
 
 void test_struct_size(void)
 {
-  TEST_ASSERT_EQUAL( 4, sizeof(void*));
-  TEST_ASSERT_EQUAL( 4, sizeof(ehci_qtd_t*));
-  TEST_ASSERT_EQUAL( 64, sizeof(ehci_qhd_t) );
+  if (4 < sizeof(void*)) // running tests in x64 environment
+  {
+    TEST_ASSERT_EQUAL( 64 - 2*sizeof(void*), offsetof(ehci_qhd_t, p_qtd_list_head) );
+  }else
+  {
+    TEST_ASSERT_EQUAL( 64, sizeof(ehci_qhd_t) );
+  }
   TEST_ASSERT_EQUAL( 32, sizeof(ehci_qtd_t) );
 
   TEST_ASSERT_EQUAL( 64, sizeof(ehci_itd_t) );