Fix build on Linux/x32 systems (x86-64 ILP32)

When I tested this, it compiled, but either I wasn't using the same
compiler or the problem happens during linking: we can't use .quad
(64-bit) with a relocation on x32. So instead, let's use .long (32-bit).

Task-number: QTBUG-52658
Change-Id: Ifea6e497f11a461db432ffff14468d1a16f49c67
Reviewed-by: Shawn Rutledge <shawn.rutledge@theqtcompany.com>

src/corelib/global/qversiontagging.h

@@ -58,9 +58,9 @@ QT_BEGIN_NAMESPACE
 // don't make tags in QtCore, bootstrapped systems or if the user asked not to
 #elif defined(Q_CC_GNU) && !defined(Q_OS_ANDROID)
 #  if defined(Q_PROCESSOR_X86) && (defined(Q_OS_LINUX) || defined(Q_OS_FREEBSD_KERNEL))
-#    if defined(Q_PROCESSOR_X86_64)   // x86-64 or x32
+#    if defined(Q_PROCESSOR_X86_64) && QT_POINTER_SIZE == 8     // x86-64 64-bit
 #      define QT_VERSION_TAG_RELOC(sym) ".quad " QT_STRINGIFY(QT_MANGLE_NAMESPACE(sym)) "@GOT\n"
-#    else                               // x86
+#    else                                                       // x86 or x86-64 32-bit (x32)
 #      define QT_VERSION_TAG_RELOC(sym) ".long " QT_STRINGIFY(QT_MANGLE_NAMESPACE(sym)) "@GOT\n"
 #    endif
 #    define QT_VERSION_TAG(sym) \