output_mov_long_double_fpu_from_arm,
 output_mov_long_double_arm_from_fpu,
 output_mov_double_fpu_from_arm, output_mov_double_arm_from_fpu,
 output_return_instruction, output_func_{prologue,epilogue},
 arm_print_operand, output_load_symbol):  Print the register prefix
before each register name.
(output_func_prologue, output_lcomm_directive):  Output the target
dependent comment char for asm comments.

From-SVN: r7442