dsp-tools: Move download link away from Google Code

Google Code is being shut down. The google code site which hosts the
source .tar.gz references github/felipec, which has a dsp-tools repository
with the same code as the tar.gz previously referenced.

Change the DSP_TOOLS_SITE to this github repo.

Signed-off-by: Alan Ott <alan@softiron.co.uk>
Signed-off-by: Carlos Santos <casantos@datacom.ind.br>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/dsp-tools/dsp-tools.mk

@@ -4,8 +4,8 @@
 #
 ################################################################################
 
-DSP_TOOLS_VERSION = 2.0
-DSP_TOOLS_SITE = http://gst-dsp.googlecode.com/files
+DSP_TOOLS_VERSION = v2.0
+DSP_TOOLS_SITE = $(call github,felipec,dsp-tools,$(DSP_TOOLS_VERSION))
 DSP_TOOLS_DEPENDENCIES = tidsp-binaries
 DSP_TOOLS_LICENSE = LGPLv2.1
 DSP_TOOLS_LICENSE_FILES = LICENSE