Revert libs dependency.

Second try clean spec.

xz.spec

@@ -17,6 +17,7 @@ Source100:	colorxzgrep.sh
 Source101:	colorxzgrep.csh
 
 URL:		http://tukaani.org/%{name}/
+Requires:	%{name}-libs%{?_isa} = %{version}-%{release}
 
 # For /usr/libexec/grepconf.sh (RHBZ#1189120).
 # Unfortunately F21 has a newer version of grep which doesn't
@@ -55,6 +56,7 @@ XZ utils.  Most users should *not* install this.
 %package 	devel
 Summary:	Devel libraries & headers for liblzma
 License:	Public Domain
+Requires:	%{name}-libs%{?_isa} = %{version}-%{release}
 
 %description	devel
 Devel libraries and headers for liblzma.