[kutil] Fix failing heap allocator tests

The tests clearly haven't even been built in a while. I've added a
helper script to the project root. Also added a kassert() handler that
will allow tests to catch or fail on asserts.

src/tests/main.cpp

@@ -1,2 +1,29 @@
-#define CATCH_CONFIG_MAIN
+#define CATCH_CONFIG_RUNNER
 #include "catch.hpp"
+
+#include "kutil/assert.h"
+
+bool ASSERT_EXPECTED = false;
+bool ASSERT_HAPPENED = false;
+void test_assert(const char *file, unsigned line, const char *message)
+{
+	CAPTURE( file );
+	CAPTURE( line );
+	INFO( message );
+	REQUIRE( ASSERT_EXPECTED );
+	ASSERT_EXPECTED = false;
+	ASSERT_HAPPENED = true;
+}
+
+
+int main( int argc, char* argv[] ) {
+	kutil::assert_set_callback(test_assert);
+
+	int result = Catch::Session().run( argc, argv );
+	return result;
+}
+
+namespace kutil {
+void * kalloc(size_t size) { return malloc(size); }
+void kfree(void *p) { return free(p); }
+}