re PR bootstrap/46397 (lto-plugin.c does not build on Solaris 10/SPARC)

	PR bootstrap/46397
	PR bootstrap/46362
	* configure.ac: Add AC_TYPE_INT64_T test.
	* config.h.in: Regenerate.
	* configure: Likewise.
	* lto-plugin.c (debug): Use char not bool.
	(nop): Likewise.
	(check_1): Rename from check, and use int not bool for gate argument.
	(check): Macro wrapper for the above to coerce gate argument into
	boolean-valued integer in case it has pointer type.
	(parse_table_entry): Use 0 not false.
	(claim_file_handler): Avoid use of PRIx64 by splitting 64-bit size
	into two 32-bit parts and printing as hex ints.

From-SVN: r166601