Log Message:
* Don't use LTCONFIG_OVERRIDE and let pkgsrc automatically use the
  pkgsrc-installed libtool.  Modify the configure script to grep the
  libtool we're using for the values of various libtool-derived
  variables.  While here, fix the name of the variable that contains
  the flags to pass linker options to the compiler.

* Drop the use of SUBST_FILES to directly substitute into cimcomp.c
  and just patch the Makefile to pass the proper flags when compilng.