On systems that don't have <stdint.h> (i.e., Microsoft, which is
tragically underfunded and cannot spare the resources necessary to
provide and support this header: http://tinyurl.com/absoh8),
SpiderMonkey header files should not introduce definitions for these
types, as doing so may conflict with client code's attempts to provide
its own definitions for these types.
Instead, have jstypes.h define JS{Int,Uint}{8,16,32,64,Ptr} types
based on configure's results, and make jsstdint.h into an uninstalled
header for use within SpiderMonkey that does whatever is necessary to
get definitions for the <stdint.h> types.
The changes to make the appropriate SpiderMonkey .cpp files #include
"jsstdint.h" explicitly are in a separate patch, for ease of review.
