Put plugins in $(pkglibdir)/modules

We can now store other architecture-dependant files in $(pkglibdir)
(and without bugging the plugins scan).

modules/Makefile.am

@@ -71,7 +71,7 @@ stamp-cache:
 
 install-exec-hook:
 	if test -z "$(DESTDIR)"; then \
-		../bin/vlc-cache-gen$(EXEEXT) "$(vlclibdir)" ; \
+		../bin/vlc-cache-gen$(EXEEXT) "$(vlclibdir)/modules" ; \
 	else \
 		echo "Staged installation: cache generation skipped!" ; \
 	fi

modules/common.am

@@ -7,7 +7,7 @@
 
 NULL =
 SUFFIXES =
-libvlcdir = $(vlclibdir)/$(basedir)
+libvlcdir = $(vlclibdir)/modules/$(basedir)
 EXTRA_DIST = Modules.am
 BUILT_SOURCES =
 CLEANFILES = $(BUILT_SOURCES)

src/Makefile.am

@@ -192,7 +192,7 @@ libvlccore_la_CFLAGS = `$(VLC_CONFIG) --cflags libvlccore` \
 	-DSYSCONFDIR=\"$(sysconfdir)\" \
 	-DDATA_PATH=\"$(vlcdatadir)\" \
 	-DLIBDIR=\"$(libdir)\" \
-	-DPLUGIN_PATH=\"$(vlclibdir)\"
+	-DPLUGIN_PATH=\"$(vlclibdir)/modules\"
 libvlccore_la_LDFLAGS = `$(VLC_CONFIG) --ldflags libvlccore` $(AM_LDFLAGS) \
 	-no-undefined \
 	-export-symbols $(srcdir)/libvlccore.sym \