Fix : libcanfestival_unix.a not built if examples are not compiled

Problem: when building Canfestival with unix timers 'libcanfestiva_unix.a'
is built only if you build examples too.

Test case:

$ ./configure --timers=unix --can=socket --target=unix
$ make canfestival

...

no errors but 'libcanfestival_unix.a' is not built:
$ find . -name "*.a"
./src/libcanfestival.a

Changing line 90 of 'drivers/unix/Makefile.in' to:
#driver: $(OBJS)
driver: libcanfestival_$(TARGET).a

solves the problem:

$ ./configure --timers=unix --can=socket --target=unix
$ make canfestival

...

$ find . -name "*.a"
./drivers/unix/libcanfestival_unix.a
./src/libcanfestival.a

     1

#ifndef TESTSLAVEGUI_H_

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#define TESTSLAVEGUI_H_

     3

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extern "C"

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{

     6

#include "canfestival.h"

     7

}

     8

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int main_can (s_BOARD SlaveBoard, char *LibraryPath);

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void stop_slave ();

    11

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#endif /*TESTSLAVEGUI_H_ */