Switch to the libgpg-error provided estream.
* configure.ac (NEED_GPG_ERROR_VERSION): Reguire 1.14. (GPGRT_ENABLE_ES_MACROS): Define. (estream_INIT): Remove. * m4/estream.m4: Remove. * common/estream-printf.c, common/estream-printf.h: Remove. * common/estream.c, common/estream.h: Remove. * common/init.c (_init_common_subsystems): Call gpgrt initialization.