Add fieldnames.m which extensds fieldnames() to work on Java objects. Deprecate javafields. Rename old C++ fieldnames to __fieldnames__. * scripts/deprecated/javafields.m: Moved from scripts/java. Added deprecated warning. * scripts/java/javafields.m: Moved to scripts/deprecated. * scripts/general/fieldnames.m: New m-file which accepts Java, structure, or Octave objects as inputs. * libinterp/octave-value/ov-struct.cc(Ffieldnames): Renamed fieldnames to __fieldnames__ to avoid class with fieldnames.m. * scripts/deprecated/module.mk: Added javafields to deprecated build. * scripts/general/module.mk: Added fieldnames.m to build. * scripts/java/module.mk: Removed javafields.m from build.

FCN_FILE_DIRS += deprecated

deprecated_FCN_FILES = \
  deprecated/__error_text__.m \
  deprecated/cor.m \
  deprecated/corrcoef.m \
  deprecated/cut.m \
  deprecated/error_text.m \
  deprecated/isstr.m \
  deprecated/javafields.m \
  deprecated/java_get.m \
  deprecated/java_new.m \
  deprecated/java_set.m \
  deprecated/polyderiv.m \
  deprecated/setstr.m \
  deprecated/shell_cmd.m \
  deprecated/studentize.m \
  deprecated/sylvester_matrix.m

FCN_FILES += $(deprecated_FCN_FILES)

PKG_ADD_FILES += deprecated/PKG_ADD

DIRSTAMP_FILES += deprecated/$(octave_dirstamp)