Defines starting with `a' in machdep/i386/fp_emul

• abs_op machdep/i386/fp_emul/fp_e80387.h:189
• added_one machdep/i386/fp_emul/fp_e80387.h:138
• add_op machdep/i386/fp_emul/fp_e80387.h:181
• affine machdep/i386/fp_emul/fp_e80387.h:246
• ALIGN machdep/i386/fp_emul/fp_e80387.h:85
• a_m machdep/i386/fp_emul/fp_status.s:86
• a_mask machdep/i386/fp_emul/fp_e80387.h:308
• arctan_op machdep/i386/fp_emul/fp_e80387.h:196