Update to 3.3.49
    
    - New upstream release 3.3.49
      - Fix crashes caused by X11 protocol limitation for pixmap size
      - Potential buffer overflow fix in vcd2fst
      - Added ability to store environment variable information in FST files
        (FST_MT_ENVVAR)
      - Fixed bad enum for FST_PT_MAX
      - Added contrib/fst_jni directory to distribution
      - Fixed broken "make dist" variants
      - Added buffer and linkage data directions (future expansion for VHDL) in
        FST and gtkwave
      - Removed requirement for fsdbdebug in path when FsdbReader is present
      - Fixed ordering of static FSDB libraries for when dynamic ones are not
        present
      - Added direction filters to SST name filter search, i.e. adding +I+, +O+,
        +IO+, +B+, or +L+ before the regular expression adds additional filtering
        criteria (direction filters are case-insensitive)
      - Relax FSDB loader to allow VHDL and mixed-language files
      - Added VHDL hierarchy types to FST, internal VCD loaders and also
        vcdfst/fst2vcd
      - Added in VHDL to FST (which will also allow other languages): gtkwave can
        process these types (e.g., signal + std_ulogic), but there are currently no
        simulators supporting them