exp__D, exp__E, log__D, and log__L are private; prepend leading "__"

exp__D, exp__E, log__D, and log__L are private; prepend leading "__"

SCCS-vsn: lib/libm/common_source/cosh.c 5.7
SCCS-vsn: lib/libm/common_source/erf.c 5.8
SCCS-vsn: lib/libm/common_source/exp__E.c 5.7
SCCS-vsn: lib/libm/common_source/expm1.c 5.7
SCCS-vsn: lib/libm/common_source/gamma.c 5.4
SCCS-vsn: lib/libm/common_source/lgamma.c 5.12
SCCS-vsn: lib/libm/common_source/log.c 5.11
SCCS-vsn: lib/libm/common_source/log1p.c 5.7
SCCS-vsn: lib/libm/common_source/log__L.c 5.7
SCCS-vsn: lib/libm/common_source/mathimpl.h 5.6
SCCS-vsn: lib/libm/common_source/pow.c 5.10