configure.in: remove spaces followed by tabs

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47130 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
configure.in: fix jemalloc check

* configure.in (jemalloc): check with JEMALLOC_MANGLE if not found
  without the mangling.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47131 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2014-08-11

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47132 b2dd03c8-39d4-4d8f-98ff-823fe69b080e