伙伴系统(buddy system)算法实现。两个文件

buddysystem.c，buddysystem.h，主要实现了两个主功能函数1.Buddy System 内存块分配算法，函数AllocBuddySpace；2.Buddy System 空闲块回收算法，函数FreeBuddy。-Buddy system (buddy system) algorithm. Two files buddysystem.c, buddysystem.h, mainly to achieve two main functions function 1.Buddy System memory block allocation algorithm, function AllocBuddySpace　2.Buddy System free block recovery algorithms, function FreeBuddy.