contrib/rpm: fix up sub-package dependencies

There are three fixes:

1) the config packages shouldn't require the main NetworkManager
package.  We explicitly make NetworkManager-glib not
depend on NM itself to ensure that clients can link to it (and thus
have an RPM dependency on -glib) without pulling in NetworkManager
itself.  The same should hold true for the config packages, since
consumers of NetworkManager may want to pull them in, but not
necessarily pull NetworkManager in.

For example, GNOME Shell wants to make use of NetworkManager's
connectivity detection *if NM is available*, and this requires
pulling in NM-config-connectivity-fedora, but that shouldn't
pull in NetworkManager itself.

Similarly, we had a problem with RHEL7 making sure that
NM-config-server was installed by default on Server variants but
not on other variants; removing the dependency from the -config
subpackage was the cleanest way to fix that.

Furthermore, nothing in the config sub-packages actually
requires NetworkManager anyway since they are simply config files.

2) nmtui doesn't care what architecture the running NM is since
it communicates solely over D-Bus.  So skip the %{?_isa}, just
like we do for other clients (nm-applet, GNOME Shell, etc)

3) Requiring NetworkManager.%{?_isa} from the -devel package
has problems with multilib (see rh #1112367).  This is an issue
if you install a 32-bit development environment and try to build
something that uses NetworkManager.  Since the -devel package
requires the main package, you can end up either having *both*
NetworkManager.i686 and NetworkManager.x86_64 installed, or you
end up having NetworkManager.i686 replace NetworkManager.x86_64.
Neither one is good. So remove the %{?_isa} bit.

contrib/fedora/rpm/NetworkManager.spec

@@ -258,7 +258,7 @@ devices.
 %package devel
 Summary: Libraries and headers for adding NetworkManager support to applications
 Group: Development/Libraries
-Requires: %{name}%{?_isa} = %{epoch}:%{version}-%{release}
+Requires: %{name} = %{epoch}:%{version}-%{release}
 Requires: dbus-devel >= %{dbus_version}
 Requires: dbus-glib >= %{dbus_glib_version}
 Requires: pkgconfig
@@ -295,7 +295,6 @@ NetworkManager functionality from applications that use glib.
 %package config-connectivity-fedora
 Summary: NetworkManager config file for connectivity checking via Fedora servers
 Group: System Environment/Base
-Requires: %{name}%{?_isa} = %{epoch}:%{version}-%{release}
 
 %description config-connectivity-fedora
 This adds a NetworkManager configuration file to enable connectivity checking
@@ -304,7 +303,6 @@ via Fedora infrastructure.
 %package config-server
 Summary: NetworkManager config file for "server-like" defaults
 Group: System Environment/Base
-Requires: %{name}%{?_isa} = %{epoch}:%{version}-%{release}
 
 %description config-server
 This adds a NetworkManager configuration file to make it behave more
@@ -320,7 +318,7 @@ deployments.
 %package tui
 Summary: NetworkManager curses-based UI
 Group: System Environment/Base
-Requires: %{name}%{?_isa} = %{epoch}:%{version}-%{release}
+Requires: %{name} = %{epoch}:%{version}-%{release}
 Requires: %{name}-glib%{?_isa} = %{epoch}:%{version}-%{release}
 
 %description tui