indirect dependency missing (pr #38644)

["Jeremy C. Reed" <reed%reedmedia.net@localhost>]

Please see ticket #38644 and comment.

tx:xfreecell$ make show-var VARNAME=BUILDLINK_DEPMETHOD.libX11
full

tx:xfreecell$ objdump -x /usr/pkg/bin/xfreecell | grep NEED                    
  NEEDED      libXext.so.6
  NEEDED      libX11.so.6
  NEEDED      libstdc++.so.6
  NEEDED      libm.so.0
  NEEDED      libgcc_s.so.1
  NEEDED      libc.so.12
  VERNEED     0x401690
  VERNEEDNUM  0x1

tx:xfreecell$ pkg_info -n xfreecell                                            
Information for xfreecell-1.0.5bnb1:

Requires:
libXext>=0.99.0




  Jeremy C. Reed