INT_MIN. Without this fix, the following lines will fail when configuring
gnu stdlibc++ library. (INT_MAX and INT_MIN are undefined.)
#define WCHAR_MAX INT_MAX
#define WCHAR_MIN INT_MIN
Change-Id: Ifa87cf011cf7068c48755fc9ce5c0d73e95ef2dc
Signed-off-by: Chao-Ying Fu <fu@mips.com>