Using LIBRARY_PATH was introduced in
16b8aff85b, but is wrong since
this variable is used by the compiler (gcc) at link time.
* gnu/packages/patches/kinit-kdeinit-libpath.patch: Change
LIBRARY_PATH to KDEINIT5_LIBRARY_PATH.
* gnu/packages/kde-frameworks.scm (kinit)[native-search-paths]:
New field.
Transfer the NixOS "kdeinit-libpath" patch for kinit as of
2018-02-17.
* gnu/packages/patches/kinit-kdeinit-libpath.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/kde-frameworks.scm (kinit)[source]: Use it.