configure: add '-uninstalled' to uninstalled .pc files

pkg-config(1) expects uninstalled pc files to follow the
blah-uninstalled.pc naming convention and the behavior
of the program is impacted by it. Without this fix
overriding PKGP_CONFIG_LIBDIR is required to ensure
uninstalled files are preferred (overkill), instead of
just adding pc-uninstalled/ to the utility's search path
by setting PKG_CONFIG_PATH accordingly.

Signed-off-by: Reynaldo H. Verdejo Pinochet <reynaldo@osg.samsung.com>

configure

@@ -6816,7 +6816,7 @@ EOF
 mkdir -p doc/examples/pc-uninstalled
 includedir=${source_path}
 [ "$includedir" = . ] && includedir="\${pcfiledir}/../../.."
-    cat <<EOF > doc/examples/pc-uninstalled/$name.pc
+    cat <<EOF > doc/examples/pc-uninstalled/${name}-uninstalled.pc
 prefix=
 exec_prefix=
 libdir=\${pcfiledir}/../../../$name