Fix OpenACC enter/exit data ICE.

Fix OpenACC enter/exit data ICE.

    [...]: In function 'f_acc_data':
    [...]:4:1: internal compiler error: in expand_gimple_stmt_1, at cfgexpand.c:3413
     f_acc_data (void)
     ^
    0x70cad3 expand_gimple_stmt_1
            [...]/source-gcc/gcc/cfgexpand.c:3413
    0x70cad3 expand_gimple_stmt
            [...]/source-gcc/gcc/cfgexpand.c:3440
    0x712b3d expand_gimple_basic_block
            [...]/source-gcc/gcc/cfgexpand.c:5273
    0x71479e execute
            [...]/source-gcc/gcc/cfgexpand.c:5882

	gcc/
	* omp-low.c (build_omp_regions_1, make_gimple_omp_edges)
	<GIMPLE_OMP_TARGET>: Handle
	GF_OMP_TARGET_KIND_OACC_ENTER_EXIT_DATA the same as
	GF_OMP_TARGET_KIND_OACC_UPDATE.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gomp-4_0-branch@218567 138bc75d-0d04-0410-961f-82ee72b054a4