meson coverage test

hello.c

#include <stdio.h>
int main(int argc, char **argv) {
  printf("Hello world!\n");
  return 0;
}

hello.rs

fn main() {
    println!("Hello world!");
}

meson.build

project('coverage-test', 'c', 'rust')

hello_c = executable('hello_c', 'hello.c')
test('hello_c', hello_c)

hello_rs = executable('hello_rs', 'hello.rs')
test('hello_rs', hello_rs)