install pkg-config file into libdir
install pkg-config file into libdir

Most pkgconfig files contain a Libs: variable, which is either /usr/lib
or /usr/lib64. If a 32bit and a 64bit variant of fmt libraries is
installed, the last one wins. As a result compiling for the other
bitsize will fail.

Instead of sharedir use libdir as install target.

Fixes commit 9d0c9c4bb145a286f725cd38c90331eee7addc7f
Fixes commit 287342dab10a5a96479b3e21cd11ce671ed8125c

Signed-off-by: Olaf Hering <ded022db89399a060a39da31922f173c6556c2d9@aepfle.de>

alabuzhev/fmt,alabuzhev/fmt,alabuzhev/fmt,cppformat/cppformat,cppformat/cppformat,cppformat/cppformat