Add strtoll and strtoull to libiberty.

2014-10-28  Yury Gribov  <y.gribov@samsung.com>

include/
	* libiberty.h (strtol, strtoul, strtoll, strtoull): New prototypes.

libiberty/
	* strtoll.c: New file.
	* strtoull.c: New file.
	* configure.ac: Add long long checks.  Add harness for strtoll and
	strtoull.  Check decls for strtol, strtoul, strtoll, strtoull.
	* Makefile.in (CFILES, CONFIGURED_OFILES): Add strtoll and strtoull.
	* config.in: Regenerate.
	* configure: Regenerate.
	* functions.texi: Regenerate.
	* testsuite/Makefile.in (check-strtol): New rule.
	(test-strtol): Likewise.
	(mostlyclean): Clean up strtol test.
	* testsuite/test-strtol.c: New test.

From-SVN: r216772