* configure.in (rb_cv_binary_elf): get rid of -e option of cat
	  which is not available on BusyBox, use tr instead.
	  [ruby-core:64824] [Bug #10210]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@49248 b2dd03c8-39d4-4d8f-98ff-823fe69b080e