FreeBSD/ports cb29bc8 (r432126)audio/csound Makefile, audio/csound6 Makefile

Update math/gmm++ to 5.1

Due to it requiring c++11 features now, the consumers audio/csound
and audio/csound6 we're version bumped, and set USE_CXXSTD.

* http://download.gna.org/getfem/html/homepage/whatsnew/5.0.html
* http://download.gna.org/getfem/html/homepage/whatsnew/5.1.html

Reviewed by:    rakuco
Approved by:    rakuco (mentor)
Differential Revision:  https://reviews.freebsd.org/D7730
DeltaFile
+3-2math/gmm++/distinfo
+3-1audio/csound/Makefile
+3-1audio/csound6/Makefile
+1-1math/gmm++/Makefile
+1-0math/gmm++/pkg-plist
+11-55 files

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