Fixed regression in plain W32 build.
* Makefile.am (system_components): Remove custom cppflags from RCCOMPILE (because gpg-error adds -idirafter that makes RC bail. [HAVE_W32CE_SYSTEM]: Add w32-ce.h and w32-ce.c, clear libexec_PROGRAMS. * w32-ce.h, w32-ce.c: New files.