Fix building on MIPS.
https://bugs.gentoo.org/show_bug.cgi?id=266471
http://bugs.python.org/issue4305

--- Modules/_ctypes/libffi/configure.ac
+++ Modules/_ctypes/libffi/configure.ac
@@ -106,10 +106,10 @@
 	;;
 
   mips-sgi-irix5.* | mips-sgi-irix6.*)
-	TARGET=MIPS; TARGETDIR=mips
+	TARGET=MIPS_IRIX; TARGETDIR=mips
 	;;
   mips*-*-linux*)
-	TARGET=MIPS; TARGETDIR=mips
+	TARGET=MIPS_LINUX; TARGETDIR=mips
 	;;
 
   powerpc*-*-linux* | powerpc-*-sysv*)
@@ -162,7 +162,7 @@
   AC_MSG_ERROR(["libffi has not been ported to $host."])
 fi
 
-AM_CONDITIONAL(MIPS, test x$TARGET = xMIPS)
+AM_CONDITIONAL(MIPS,[expr x$TARGET : 'xMIPS' > /dev/null])
 AM_CONDITIONAL(SPARC, test x$TARGET = xSPARC)
 AM_CONDITIONAL(X86, test x$TARGET = xX86)
 AM_CONDITIONAL(X86_FREEBSD, test x$TARGET = xX86_FREEBSD)
--- Modules/_ctypes/libffi/configure
+++ Modules/_ctypes/libffi/configure
@@ -20426,10 +20426,10 @@
 	;;
 
   mips-sgi-irix5.* | mips-sgi-irix6.*)
-	TARGET=MIPS; TARGETDIR=mips
+	TARGET=MIPS_IRIX; TARGETDIR=mips
 	;;
   mips*-*-linux*)
-	TARGET=MIPS; TARGETDIR=mips
+	TARGET=MIPS_LINUX; TARGETDIR=mips
 	;;
 
   powerpc*-*-linux* | powerpc-*-sysv*)
@@ -20484,7 +20484,7 @@
    { (exit 1); exit 1; }; }
 fi
 
- if test x$TARGET = xMIPS; then
+ if expr x$TARGET : 'xMIPS' > /dev/null; then
   MIPS_TRUE=
   MIPS_FALSE='#'
 else