Revert "gst-plugins-base: disable parallel build"

This reverts commit 54b60ba6aa0ff1b6c851e704bc36945ca052b2b3.

As requested by Sven. Not needed as we now have fixed the testchannels
issue.

package/multimedia/gst-plugins-base/gst-plugins-base.mk

@@ -8,8 +8,6 @@ GST_PLUGINS_BASE_SOURCE = gst-plugins-base-$(GST_PLUGINS_BASE_VERSION).tar.bz2
 GST_PLUGINS_BASE_SITE = http://gstreamer.freedesktop.org/src/gst-plugins-base
 GST_PLUGINS_BASE_INSTALL_STAGING = YES
 
-GST_PLUGINS_BASE_MAKE = $(MAKE1)
-
 # freetype is only used by examples, but if it is not found
 # and the host has a freetype-config script, then the host
 # include dirs are added to the search path causing trouble