config.gcc (*-*-vxworks*): Add TARGET_VXWORKS7=1 to tm_defines for all vxworks7 targets.

config.gcc (*-*-vxworks*): Add TARGET_VXWORKS7=1 to tm_defines for all vxworks7 targets.

2017-06-26  Jerome Lambourg  <lambourg@adacore.com>
            Olivier Hainque  <hainque@adacore.com>

	* config.gcc (*-*-vxworks*): Add TARGET_VXWORKS7=1 to tm_defines
	for all vxworks7 targets.
	* config/vxworks.h (TARGET_VXWORKS7): If not defined, define to 0.
	(VXWORKS_ADDITIONAL_CPP_SPEC): Alternative definition for VXWORKS7.
	(VXWORKS_LIBS_RTP, VXWORKS_LIBS_RTP_DIR): New macros, allowing
	variations for VX6/VX7 and 32/64bits later on in ...
	(VXWORKS_LIB_SPEC): Leverage new macros.
	(VXWORKS_OS_CPP_BUILTINS): Define _VSB_CONFIG_FILE for VXWORKS7,
	as well as _ALLOW_KEYWORD_MACROS when "inline" is not a keyword.

Co-Authored-By: Olivier Hainque <hainque@adacore.com>
From-SVN: r249659