ada: Style fixes: remove blank lines following 'begin' keywords

ada: Style fixes: remove blank lines following 'begin' keywords

The GNAT style guide specifies that there must not be blank lines after
'begin' keywords.

gcc/ada/

	* backend_utils.adb (Scan_Common_Back_End_Switch): Remove blank
	line.
	* errout.adb (Output_JSON_Message): Likewise.
	* erroutc.adb (Set_Msg_Char): Likewise.
	* exp_aggr.adb (Two_Dim_Packed_Array_Handled): Likewise.
	* exp_pakd.adb (Expand_Packed_Address_Reference): Likewise.
	(Expand_Packed_Bit_Reference): Likewise.
	(Expand_Packed_Boolean_Operator): Likewise.
	(Expand_Packed_Element_Reference): Likewise.
	(Expand_Packed_Eq): Likewise.
	(Expand_Packed_Not): Likewise.
	* exp_prag.adb (Build_Dim3_Declaration): Likewise.
	* exp_strm.adb (Build_Elementary_Input_Call): Likewise.
	* freeze.adb (Find_Aspect_No_Parts): Likewise.
	(Get_Aspect_No_Parts_Value): Likewise.
	* gen_il-gen.adb (Compile): Likewise.
	* gnat1drv.adb (Adjust_Global_Switches): Likewise.
	* gnat_cuda.adb (Expand_CUDA_Package): Likewise.
	* gnatchop.adb (Read_File): Likewise.
	* gnatls.adb (Get_Runtime_Path): Likewise.
	* make.adb (Binding_Phase): Likewise.
	* par-ch11.adb (P_Exception_Choice): Likewise.
	* par-ch5.adb (P_Loop_Parameter_Specification): Likewise.
	* par-ch6.adb (Is_Extended): Likewise.
	* sem_attr.adb (Check_Dereference): Likewise.
	* sem_ch12.adb (Build_Subprogram_Decl_Wrapper): Likewise.
	* sem_ch3.adb (Build_Itype_Reference): Likewise.
	* sem_prag.adb (Validate_Compile_Time_Warning_Errors): Likewise.
	* sem_res.adb (Resolve_Declare_Expression): Likewise.
	* sem_util.adb (Build_Default_Subtype): Likewise.
	* sprint.adb (Sprint_Paren_Comma_List): Likewise.