RFR: 8205616: Build fails with system headers after 8204572

[John Paul Adrian Glaubitz]

Hi!

Please review this small change contributed by Fridrich Strba of SUSE
and modified by Magnus which fixes the OpenJDK build when configuring
to use system headers for libraries like jpeg and lcms.

The bug report can be found in [1] and the webrev in [2].

Thanks,
Adrian

> [1] https://bugs.openjdk.java.net/browse/JDK-8205616
> [2] http://cr.openjdk.java.net/~glaubitz/8205616/webrev.00/

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz at debian.org
`. `'   Freie Universitaet Berlin - glaubitz at physik.fu-berlin.de
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913