Change from configure time to compile time probe for intptr_t definition.
2015-03-23 Joel Sherrill <joel.sherrill@oarcorp.com
* configure.in: Delete logic to determine _UINTPTR_EQ_ULONGLONG
and _UINTPTR_EQ_ULONG at configuration time.
*libc/include/sys/config.h: Add logic to determine
_UINTPTR_EQ_ULONGLONG and _UINTPTR_EQ_ULONG at compilation time.
* libc/include/inttypes.h: Add include of <sys/config.h>.
* configure: Regenerated.