gold/s390: Fix compilation on gcc 4.4
    
    gold/ChangeLog:
    
    	PR/19960
    	* s390.cc (Target_s390::ss_code_st_r14): Removed.
    	(Target_s390::ss_code_l_r14): Removed.
    	(Target_s390::ss_code_ear): Removed.
    	(Target_s390::ss_code_c): Removed.
    	(Target_s390::ss_match_st_r14): New function.
    	(Target_s390::ss_match_l_r14): New function.
    	(Target_s390::ss_match_mcount): Call ss_match_{l,st}_r14 instead
    	of matching code directly.
    	(Target_s390::ss_match_ear): New function.
    	(Target_s390::ss_match_c): New function.
    	(Target_s390::do_calls_non_split): Call ss_match_{ear,c} instead
    	of matching code directly.