Update.
* sysdeps/ieee754/dbl-64/s_sin.c: Include "math_private.h" for
internal prototypes.
* sysdeps/ieee754/dbl-64/doasin.c: Likewise.
* sysdeps/ieee754/dbl-64/dosincos.c: Likewise.
* sysdeps/ieee754/dbl-64/halfulp.c: Likewise.
* sysdeps/ieee754/dbl-64/sincos32.c: Likewise.
* sysdeps/ieee754/dbl-64/slowexp.c: Likewise.
* sysdeps/ieee754/dbl-64/slowpow.c: Likewise.
* math/math_private.h: Add prototypes for internal functions of
the IBM Accurate Mathematical Library.
* sysdeps/ieee754/dbl-64/s_atan.c: Include "math.h" for
prototypes.
* sysdeps/ieee754/dbl-64/s_tan.c: Likewise.