prctl: Add support for PR_SET_THP_DISABLE and PR_GET_THP_DISABLE

Change-Id: I04c5568a9eb78bcac632b734f34bba49cf602c4d
Refs: #1181

test/issues/1181/mmap_large.c

@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/mman.h>
+
+#define MAP_SIZE (16 << 20)
+
+int main(int argc, char **argv)
+{
+	int ret = 0;
+	void *mem = NULL;
+
+	mem = mmap(NULL, MAP_SIZE, PROT_READ | PROT_WRITE,
+			MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+
+	if (!mem) {
+		printf("mmap failed\n");
+		ret = -1;
+		goto out;
+	}
+
+	printf("mmap to %p, size: %ldM\n", mem, MAP_SIZE / 1024 / 1024);
+
+	memset(mem, 0, MAP_SIZE);
+
+ out:
+	if (mem) {
+		munmap(mem, MAP_SIZE);
+	}
+	return 0;
+}