pkg-perl: fix build of perl XS packages

Set OPTIMIZE in order to avoid the use of the host $Config{optimize} value
which could cause breakage when cross-compiling for the target.

See discussion in http://lists.busybox.net/pipermail/buildroot/2014-August/104129.html

Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
support/script/scancpan: add option test

test modules are usually useless on BR
Try-Tiny: add host
Plack: all packages
moo: all packages
dancer2: all packages

TT: PERL_TEMPLATE_TOOLKIT_CONF_OPT = "TT_XS_ENABLE=n"
network interface eth0
defconfig
demo

set BR2_ROOTFS_OVERLAY with $(BR2_EXTERNAL)/overlay/
dancer2 skeleton

$ dancer2 gen -a MyWeb::App
Dancer2 as service
BR demo
add Chart-Plot-Tagged
add ntp in defconfig
update plot
user guest