buildroot

package/uclibc: enable wordexp functionality

Wordexp support is needed by more and more packages, recently
bluez5_utils. It adds only ~16 KB to uClibc, so let's add it by default
to keep things simple.

Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Waldemar Brodkorb <wbx@openadk.org>
[Thomas: rework commit message.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>