GTAGS: add gtags.files

for a much smaller proper GPATH file

gtags.files

@@ -0,0 +1,92 @@
+src/decode.h
+src/reedsolomon.h
+src/bits.h
+src/logging.c
+src/free.h
+src/in_json.c
+src/out_geojson.c
+src/codepages/BIG5.h
+src/codepages/CP437.h
+src/codepages/CP850.h
+src/codepages/CP852.h
+src/codepages/CP855.h
+src/codepages/CP857.h
+src/codepages/CP860.h
+src/codepages/CP861.h
+src/codepages/CP863.h
+src/codepages/CP864.h
+src/codepages/CP865.h
+src/codepages/CP866.h
+src/codepages/CP869.h
+src/codepages/CP932.h
+src/codepages/CP949.h
+src/codepages/GB2312.h
+src/codepages/ISO-8859-2.h
+src/codepages/ISO-8859-3.h
+src/codepages/ISO-8859-4.h
+src/codepages/ISO-8859-5.h
+src/codepages/ISO-8859-6.h
+src/codepages/ISO-8859-7.h
+src/codepages/ISO-8859-8.h
+src/codepages/ISO-8859-9.h
+src/codepages/JOHAB.h
+src/codepages/MACINTOSH.h
+src/codepages/WINDOWS-1250.h
+src/codepages/WINDOWS-1251.h
+src/codepages/WINDOWS-1252.h
+src/codepages/WINDOWS-1253.h
+src/codepages/WINDOWS-1254.h
+src/codepages/WINDOWS-1255.h
+src/codepages/WINDOWS-1256.h
+src/codepages/WINDOWS-1257.h
+src/codepages/WINDOWS-1258.h
+src/codepages/WINDOWS-1361.h
+src/codepages/WINDOWS-874.h
+src/codepages/WINDOWS-932.h
+src/codepages/WINDOWS-936.h
+src/codepages/WINDOWS-949.h
+src/codepages/WINDOWS-950.h
+src/decode.c
+src/in_dxf.c
+src/print.h
+src/logging.h
+src/importer.h
+src/classes.c
+src/dwg.c
+src/bits.c
+src/encode.h
+src/geom.h
+src/dynapi.h
+src/geom.c
+src/decode_r11.h
+src/free.c
+src/out_dxf.h
+src/print.c
+src/out_dxf.c
+src/common.h
+src/in_dxf.h
+src/decode_r11.c
+src/in_json.h
+src/spec.h
+src/common.c
+src/dec_macros.h
+src/hash.c
+src/out_dxfb.c
+src/out_json.c
+src/dxfclasses.c
+src/decode_r2007.c
+src/out_json.h
+src/dwg_api.c
+src/hash.h
+src/out_dxf_r11.c
+src/dynapi.c
+src/codepages.c
+src/encode1.c
+src/classes.h
+src/codepages.h
+src/myalloca.h
+src/reedsolomon.c
+src/objects.c
+src/encode.c
+include/dwg_api.h
+include/dwg.h