parallel make bug in tune/ directory

[Torbjörn Granlund]

Win C <winsto003 at hotmail.com> writes:

  This is a bug of the current mercurial repo in the tune/ directory:
  
  When I run `make -j6 allprogs` for the first time, an error was emitted:
  
  
  libtool: link: (cd .libs/libspeed.lax/libtests.a && ar x "/data/data/com.termux/files/home/gmp-unstable/tune/../tests/.libs/libtests.a")
  
  libtool:   error: cannot find the library 'libspeed.la' or unhandled argument 'libspeed.la'
  
  make: *** [Makefile:626: tune-gcd-p] Error 1
  
  The error will not be emitted when I invoke the above command for the second time. How to fix this? Thanks!

Parallel build in the tune subdir are not supported.  Please build
normally therein.

-- 
Torbjörn
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