mediastreamer: disable test programs
Building tests produces an error during the "OBJCLD mediastream" phase with
some toolchains/architectures.
This is supposed to fix:
- http://autobuild.buildroot.net/results/
7fca436524e5f7ba300d27c615061b0838adb1e2
- http://autobuild.buildroot.net/results/
bd9027ce94348025f1ca02a77eb81b9200124d9a
- http://autobuild.buildroot.net/results/
4d9f554fc29901be1a577ca0c39369befee269b5
Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>