adaint.c: Include process.h, signal.h, dir.h and utime.h for DJGPP.

adaint.c: Include process.h, signal.h, dir.h and utime.h for DJGPP.

2016-10-11  Andris Pavenis  <andris.pavenis@iki.fi>

	* adaint.c: Include process.h, signal.h, dir.h and utime.h for DJGPP.
	ISALPHA: include <ctype.h> and define to isalpha for DJGPP when IN_RTS is defined.
	(DIR_SEPARATOR) define to '\\' for DJGPP.
	(__gnat_get_file_names_case_sensitive): return 0 for DJGPP unless
	overriden in environment
	(__gnat_is_absolute_path): Support MS-DOS style absolute paths for DJGPP.
	(__gnat_portable_spawn): Use spewnvp for DJGPP.
	(__gnat_portable_no_block_spawn): Use spawnvp for DJGPP.
	(__gnat_portable_wait): Return 0 for DJGPP.

From-SVN: r240999