Add gprof test code

gprof/profile.c

@@ -0,0 +1,31 @@
+#include <stdio.h>
+
+int __attribute__((noinline)) fibonacci(int n) {
+    if (n <= 1) return n;
+    return fibonacci(n - 1) + fibonacci(n - 2);
+}
+
+void __attribute__((noinline)) dummy_work(int count) {
+    volatile int sum = 0;
+    for (int i = 0; i < count; i++) {
+        sum += i;
+    }
+}
+
+void __attribute__((noinline)) heavy_logic() {
+    for (int i = 0; i < 5; i++) {
+	// It will take up to a few sec
+        printf("Computing fib(30)... iteration %d\n", i);
+        fibonacci(30);
+    }
+}
+
+int main(int argc, char* argv[]) {
+    printf("--- Profiling Test Start ---\n");
+
+    heavy_logic();
+    dummy_work(1000);
+
+    printf("--- Profiling Test End ---\n");
+    return 0;
+}