Always define types from stdint.h so they are always available for use in expressions no matter what debug info you have. Types added are:

int8_t
uint8_t
int16_t
uint16_t
int32_t
uint32_t
int64_t
uint64_t
intptr_t
uintptr_t
size_t
ptrdiff_t
whar_t

llvm-svn: 173724