libvorbis: fix tremor install into staging_dir

Closes #387.

When tremor is selected, the normal libvorbis shouldn't get built and
tremer should get installed into staging_dir as well.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
diff --git a/CHANGES b/CHANGES
index 7278bdf..18beb14 100644
--- a/CHANGES
+++ b/CHANGES
@@ -12,6 +12,7 @@
 	#379: update DirectFB to version 1.4.0
 	#383: gst-plugins-good: Allow soup plugin to be configured
 	#385: neon: Fix pkgconfig dependency
+	#387: Tremor not installed to toolchain
 	#391: gstreamer: Bump version to 0.10.23
 	#393: gst-plugins-base: Bump version to 0.10.23
 	#395: gst-plugins-bad: New package