Add check for glibc > 2.16

Fix broken compilation due to "Unable to create small
static TLS block in shared library"

https://sourceware.org/bugzilla/show_bug.cgi?id=14898



Change-Id: I53840dbff22f4b10bdb32401f79889f6c313f470
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>