Reduce time building tests

[albinahlback]

How about we do something similar to how tests are done in Julia?

So we have our tests, which for the sake of simplicity are said to be mymodule/test/t-fooX.c for X in 1 to 10. We can then have one main function called mymodule/test/main.c, which is written like:

#include <all_headers_go_here.h>
#include "myinclusions.h"

#include "t-foo1.c"
...
#include "t-foo10.c"

#define TEST_NUM 10

int (*test_functions[TEST_NUM])(void) =
{
    test_foo1,
    ...,
    test_foo10
};

int
main(void)
{
    int ix;

    for (ix = 0; ix < TEST_NUM; ix++)
        test_functions[ix]();

    return 0;
}

This would speed up compile time for tests a bit, and would be very easy to fix (I think this is easy to fix via shell script).

[albinahlback]

#1341 will solve this.

[albinahlback]

This is now solved.