Merge branch 'master' into 'core-updates'.

gnu: xfig: Add 'wrap-xfig phase.

* gnu/packages/xfig.scm (xfig): Set XAPPLRESDIR environment variable to help
  xfig find the app-defaults resource files.

gnu: xfig, transfig: Patch compiler flags for mips and i686.

* gnu/packages/xfig.scm (xfig, transfig)[arguments]: Have Makefile
  substitution match for more targets.

gnu: Add transfig.

* gnu/packages/xfig.scm (transfig): New variable.

gnu: Add xfig.

* gnu/packages/xfig.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add it.