Fix typos in params.def.

Fix typos in params.def.

2018-08-09  Martin Liska  <mliska@suse.cz>

	* params.def (PARAM_ALIGN_LOOP_ITERATIONS): Remove double dots
        at the end of a line, make first letter capital and end up
        a sentence with a dot.
	(PARAM_LOOP_INTERCHANGE_STRIDE_RATIO): Likewise.
	(PARAM_LOOP_BLOCK_TILE_SIZE): Likewise.
	(PARAM_GRAPHITE_MAX_NB_SCOP_PARAMS): Likewise.
	(PARAM_GRAPHITE_MAX_ARRAYS_PER_SCOP): Likewise.
	(PARAM_MAX_ISL_OPERATIONS): Likewise.
	(PARAM_GRAPHITE_ALLOW_CODEGEN_ERRORS): Likewise.
	(PARAM_PROFILE_FUNC_INTERNAL_ID): Likewise.
	(PARAM_INDIR_CALL_TOPN_PROFILE): Likewise.
	(PARAM_SLP_MAX_INSNS_IN_BB): Likewise.
	(PARAM_IPA_CP_EVAL_THRESHOLD): Likewise.
	(PARAM_IPA_CP_RECURSION_PENALTY): Likewise.
	(PARAM_IPA_CP_SINGLE_CALL_PENALTY): Likewise.
	(PARAM_IPA_CP_LOOP_HINT_BONUS): Likewise.
	(PARAM_IPA_CP_ARRAY_INDEX_HINT_BONUS): Likewise.
	(PARAM_TREE_REASSOC_WIDTH): Likewise.
	(PARAM_HSA_GEN_DEBUG_STORES): Likewise.
	(PARAM_MAX_SPECULATIVE_DEVIRT_MAYDEFS): Likewise.
	(PARAM_MAX_VRP_SWITCH_ASSERTIONS): Likewise.

From-SVN: r263442