Fixed execv warning when libtool creates wrapper executables

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401720

build-scripts/ltmain.sh

@@ -5008,7 +5008,7 @@ EOF
 EOF
 
             case $host_os in
-              mingw*)
+	      *cygwin* | *mingw* )
                 cat >> $cwrappersource <<EOF
   execv("$SHELL",(char const **)newargz);
 EOF