[systemd-devel] Minor improvement to footnote in http://freedesktop.org/wiki/Software/systemd/MinimalBuilds/

[Samuli Suominen]

To footnote of http://freedesktop.org/wiki/Software/systemd/MinimalBuilds/

"Because libcap doesn't have a pkg-config file yet, you can `export
ac_cv_search_cap_init=yes` and `export
ac_cv_header_sys_capability_h=yes` to skip the
matching AC_CHECK_HEADERS and AC_SEARCH_LIBS checks from configure.ac."

No worries if it doesn't get added this way, so minor thing
<http://kdzbn.homelinux.net/libcap-add-pkg-config.patch>