trickily fix build failure on x86_64

It seems that we can not run the 'autoreconf -f -i' for the nspr, I met
several strange problems while trying to do that, and the previous
author seemed had noticed this, so he wrote:

do_configure() {
       oe_runconf
}

to avoid running the "autoreconf". But we must modify configure.in to
fix the build failure on x86_64, so both modify configure and
configure.in, once the "autoreconf" can work correctly, we can remove
this patch.

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>

Upstream-Status: Inappropriate [configuration]
---
 configure |   12 ++++++------
 1 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/configure b/configure
--- a/configure
+++ b/configure
@@ -4366,9 +4366,7 @@ EOF
         PR_MD_ASFILES=os_Linux_ia64.s
         ;;
     x86_64)
-        if test -n "$USE_64"; then
-            PR_MD_ASFILES=os_Linux_x86_64.s
-        else
+        if test -n "$USE_N32"; then
             cat >> confdefs.h <<\EOF
 #define i386 1
 EOF
@@ -4376,17 +4374,19 @@ EOF
             PR_MD_ASFILES=os_Linux_x86.s
             CC="$CC -m32"
             CXX="$CXX -m32"
+        else
+            PR_MD_ASFILES=os_Linux_x86_64.s
         fi
         ;;
     ppc|powerpc)
         PR_MD_ASFILES=os_Linux_ppc.s
         ;;
     powerpc64)
-        if test -n "$USE_64"; then
+        if test -n "$USE_N32"; then
+            PR_MD_ASFILES=os_Linux_ppc.s
+        else
             CC="$CC -m64"
             CXX="$CXX -m64"
-        else
-            PR_MD_ASFILES=os_Linux_ppc.s
         fi
         ;;
     m68k)
-- 
1.7.1