elfutils: Don't try to use dgettext on Android

dgettext doesn't seem to be in bionic, causing perf to fail to link
when linking to the static libelf built here

Change-Id: I4cda6df902a6c6c05863c5485da4cc7e46299052
Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>