imagemagick: fix QA warnings for unshipped files

on build we receive tons of warnings like

WARNING: For recipe imagemagick, the following files were installed but not shipped in any package:
WARNING:   /usr/lib/ImageMagick-6.4.4/config/type.xml
WARNING:   /usr/lib/ImageMagick-6.4.4/config/type-solaris.xml
WARNING:   /usr/lib/ImageMagick-6.4.4/config/locale.xml
WARNING:   /usr/lib/ImageMagick-6.4.4/config/english.xml
WARNING:   /usr/lib/ImageMagick-6.4.4/config/type-windows.xml
WARNING:   /usr/lib/ImageMagick-6.4.4/config/type-ghostscript.xml
WARNING:   /usr/lib/ImageMagick-6.4.4/config/delegates.xml
WARNING:   /usr/lib/ImageMagick-6.4.4/config/configure.xml
WARNING:   /usr/lib/ImageMagick-6.4.4/config/francais.xml
WARNING:   /usr/lib/ImageMagick-6.4.4/modules-Q16/filters/analyze.a
WARNING:   /usr/lib/ImageMagick-6.4.4/modules-Q16/filters/analyze.la
WARNING:   /usr/lib/ImageMagick-6.4.4/modules-Q16/filters/analyze.so
WARNING:   /usr/lib/ImageMagick-6.4.4/modules-Q16/filters/.debug/analyze.so
WARNING:   /usr/lib/ImageMagick-6.4.4/modules-Q16/coders/histogram.la
WARNING:   /usr/lib/ImageMagick-6.4.4/modules-Q16/coders/ycbcr.a
...

Signed-off-by: Andreas Müller <schnitzeltony@gmx.de>
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>