ndk-build juniversalchardet的问题，解决std的问题的两种方法

方法一：在Application.mk中加APP_STL := gnustl_static

方法二：更改dll.cpp，这样包编译会小。重写strcpy和strlen 

static void MyStrcpy(char *szDst, const char *szSrc){const char *pSrc = szSrc;char *pDst = szDst;while(*pSrc)*pDst ++ = *pSrc++;*pDst = 0;}static unsigned int MyStrlen(const char *szStr){unsigned int n = 0;while (szStr[n])n++;return n;}