* w32/npth.h: Rename to ...
* w32/npth.h.in: this.
(NPTH_VERSION, NPTH_VERSION_NUMBER): New.
(npth_get_version): New.
* src/npth.h.in (NPTH_VERSION, NPTH_VERSION_NUMBER): New.
(npth_get_version): New.
* src/npth.c: Include getversion.c
* w32/npth.c: Ditto.
* src/getversion.c: New.
* src/libnpth.vers: Add npth_get_version.
* w32/npth.def: Ditto.
* src/Makefile.am: Add new file.
* tests/Makefile.am (AM_CPPFLAGS): Change -I to the build directory
for Windows.
* autogen.sh: Update from current gpgrt.
* configure.ac: Append commit id to the VERSION file.
(BUILD_COMMITID): New ac_define.
(VERSION_NUMBER): New ac_subst.
(AH_BOTTOM): New.