Bug 1066424

Description of problem:
I get the following when calling 'oyranos-config --ldflags' in Rawhide/f21

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-L/usr/lib64 -loyranos -loyranos_config -loyranos_modules -loyranos_object -loyranos_core -lelektra  -L/usr/lib64     -L -lelektra
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and the following when calling it in f20

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-L/usr/lib64 -loyranos -loyranos_object -loyranos_core -lelektra  -L/usr/lib64  -lxml2   -lyajl
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You can notice a single '-L' not accompanied with any directory in case of Rawhide. This leads to the following cinepaint build error:

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/bin/sh ../../libtool --tag=CXX   --mode=link g++ -DLOCALEDIR=\""/usr/share/locale"\"  -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches  -m32 -march=i686 -mtune=atom -fasynchronous-unwind-tables  -lstdc++ -lm -lX11 -o pdf pdf.o pdf_dialog.o ../../lib/libcinepaint.la -lstdc++ -lm -lX11  -lgtk-x11-2.0 -lgdk-x11-2.0 -lpangocairo-1.0 -latk-1.0 -lcairo -lgdk_pixbuf-2.0 -lgio-2.0 -lpangoft2-1.0 -lpango-1.0 -lgobject-2.0 -lglib-2.0 -lfontconfig -lfreetype  -lstdc++ -lm -lX11 ../../lib/fl_i18n/libcinepaint_fl_i18n.la -Wl,-z,relro -lfltk_images -lfltk -DHAVE_OY -L/usr/lib -loyranos -loyranos_config -loyranos_modules -loyranos_object -loyranos_core -lelektra  -L/usr/lib     -L -lelektra -lc 
libtool: link: require no space between `-L' and `-lelektra'
make[2]: *** [pdf] Error 1
make[2]: Leaving directory `/builddir/build/BUILD/cinepaint-1.0-4/plug-ins/pdf'
make[1]: *** [install-recursive] Error 1
make[1]: Leaving directory `/builddir/build/BUILD/cinepaint-1.0-4/plug-ins'
make: *** [install-recursive] Error 1
error: Bad exit status from /var/tmp/rpm-tmp.V4MA5w (%install)
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Version-Release number of selected component (if applicable):
oyranos-0.9.5-0.0.20140123git.fc21

How reproducible:
always

Steps to Reproduce:
oyranos-config --ldflags

Actual results:
-L/usr/lib64 -loyranos -loyranos_config -loyranos_modules -loyranos_object -loyranos_core -lelektra  -L/usr/lib64     -L -lelektra

Expected results:
The single '-L' should not be there for sure. The list of LDFLAGS needs to be re-checked.