[hsa] Consodlidate GTY roots for trees used during expansion to HSA

[hsa] Consodlidate GTY roots for trees used during expansion to HSA

2016-03-07  Martin Jambor  <mjambor@suse.cz>

	* hsa.h (hsa_get_ctor_statements): Declare.
	(hsa_get_dtor_statements): Likewise.
	(hsa_get_kernel_dispatch_type): Likewise.
	* hsa.c (hsa_get_ctor_statements): New function.
	(hsa_get_dtor_statements): Likewise.
	(hsa_get_kernel_dispatch_type): Likewise.
	* hsa-brig.c (hsa_cdtor_statements): Removed.
	(hsa_output_libgomp_mapping): Use hsa_get_ctor_statements and
	hsa_get_dtor_statements.
	* hsa-gen.c (hsa_kernel_dispatch_type): Removed.
	(get_hsa_kernel_dispatch_offset): Use hsa_get_kernel_dispatch_type.

From-SVN: r234042