[dunecontrol,bugfix] Fixes erroring out during multiarch detection.

This patch moves the "set +e" command to the correct location during
detection of the multiarch variable. That is is before any
$CXX --print-multiarch call. Now dunecontrol will not fail for compilers
not supporting it.
(cherry picked from commit 503ec712)

Signed-off-by: Markus Blatt <markus@dr-blatt.de>

bin/dunecontrol

@@ -222,6 +222,7 @@ fi
 # according to it.
 # If not compiler is specified then cc or gcc is used.
 extract_multiarch(){
+  set +e #error in the multiarch detection should not be fatal.
   local my_cxx_compiler
   if test "x$MULTIARCH_LIBDIR" != "x"; then
     return
@@ -235,7 +236,6 @@ extract_multiarch(){
     my_cxx_compiler=`echo $CONFIGURE_FLAGS | $GREP CXX| $SED "s/.*CXX=[\"']\?\([^$BLANK'\"]*\)[\"']\?.*/\1/"`
   fi
   if test "x$my_cxx_compiler" == "x"; then
-    set +e #error in the multiarch detection should not be fatal.
     $(which cc &>/dev/null)
     if test $? -eq "0"; then
       my_cxx_compiler=cc