At the moment, LEDE buildbots are complaining with:

-snip-
...
libcanfestival/examples/TestMasterSlave/TestMasterSlave.c:50: undefined reference to `MasterMap1'
TestMasterSlave.o: In function `InitNodes':
...
-snap-

Since we are only interessted in the library itself, skip compilation
of the example code. This should both fix the build and speedup it
a little bit.

Signed-off-by: Michael Heimpold <mhei@heimpold.de>

The previous attempt to fix the build error was not successfull
and introduced needlessly a new patch. However, the configure
already provide the required functionality, use it instead.

This should now really solve the build.

Signed-off-by: Michael Heimpold <mhei@heimpold.de>

Without the trailing _S_ the variable is not considered at all.

Signed-off-by: Michael Heimpold <mhei@heimpold.de>

Signed-off-by: Anton Glukhov <anton.a.glukhov@gmail.com>