xfce4-icon-theme: add xfce4-dev-tools-native to DEPENDS

fixes (detected in Martin's world build):

| /home/jenkins/oe/shr-core-branches/shr-core/tmp-eglibc/work/armv5te-oe-linux-gnueabi/xfce4-icon-theme/4.4.3-r0/xfce4-icon-theme-4.4.3/configure: line 4836: syntax error near unexpected token `am'
| /home/jenkins/oe/shr-core-branches/shr-core/tmp-eglibc/work/armv5te-oe-linux-gnueabi/xfce4-icon-theme/4.4.3-r0/xfce4-icon-theme-4.4.3/configure: line 4836: `XDT_I18N(am ar ca cs da de dz el en_GB eo et eu fi fr he hu id ja ka ko lt lv mk nb_NO pl pt_BR pt_PT ro ru si sk sq tr uk ur zh_CN zh_TW)'
| Configure failed. The contents of all config.log files follows to aid debugging

Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>