Tests: Build automatically, fix compilation errors

Tests/Kernel/null-deref-close-during-select.cpp

@@ -1,36 +0,0 @@
-#include <pthread.h>
-#include <stdio.h>
-#include <sys/select.h>
-#include <unistd.h>
-
-int pipefds[2];
-
-int main(int, char**)
-{
-    pipe(pipefds);
-
-    pthread_t tid;
-    pthread_create(
-        &tid, nullptr, [](void*) -> void* {
-            sleep(1);
-            printf("ST: close()\n");
-            close(pipefds[1]);
-            pthread_exit(nullptr);
-            return nullptr;
-        },
-        nullptr);
-
-    fd_set rfds;
-    FD_ZERO(&rfds);
-    FD_SET(pipefds[1], &rfds);
-
-    printf("MT: select()\n");
-    int rc = select(pipefds[1] + 1, &rfds, nullptr, nullptr, nullptr);
-    if (rc < 0) {
-        perror("select");
-        return 1;
-    }
-
-    printf("ok\n");
-    return 0;
-}