qtbase_git: ensure fonts go into own subdir by creating it first
qtbase_git: ensure fonts go into own subdir by creating it first

Sometimes, when ${OE_QMAKE_PATH_LIBS} is empty, "cp -a" ends up copying
font files there w/o preserving "fonts" directory, failing the following
chown command.

Signed-off-by: Denys Dmytriyenko <d29de71aea38aad3a87d486929cb0aad173ae612@ti.com>
Signed-off-by: Martin Jansa <516df3ff67e1fa5d153800b15fb204c0a1a389dc@gmail.com>

opendreambox/meta-qt5,timopulkkinen/meta-qt5,opendreambox/meta-qt5,timopulkkinen/meta-qt5,kraj/meta-qt5,meta-qt5/meta-qt5,schnitzeltony/meta-qt5,sapiippo/meta-qt5,Ivan-SB/meta-qt5,cjp256/meta-qt5,meta-qt5/meta-qt5,cjp256/meta-qt5,jruffin/meta-qt5,Tofee/meta-qt5,timopulkkinen/meta-qt5,Tofee/meta-qt5,sapiippo/meta-qt5,kraj/meta-qt5,jruffin/meta-qt5,Ivan-SB/meta-qt5,schnitzeltony/meta-qt5,timopulkkinen/meta-qt5,opendreambox/meta-qt5