nspr, nss: use ${includedir}/nspr like e.g. ubuntu does
* instead of installing all 51 nspr header files directly in ${includedir}
* ubuntu uses /usr/include/nspr as well as shown in:
https://packages.ubuntu.com/xenial/amd64/libnspr4-dev/filelist
and some components assume the same path
* update nss configure to find them, similar change might be needed in
mozjs and ecryptfs-utils
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
