[Ipopt] Ipopt maintenance release 3.12.12

[Stefan Vigerske]

Hi,

I just created a new Ipopt maintenance release.
If you were using a recent Ipopt version successfully, then there is no 
need to update.

Here is a list of changes (since 3.12.10):
- allow for --without-matlab-home to disable check for Matlab [r2748]
- add dppsv to v8-ifort [r2746]
- disable error in LibraryHandler.c if snprintf detection failed [r2751]
- fill Mumps struct with zeros when allocating in Mumps interface[r2724]
- minor fix in build-system of ThirdParty/ASL

The source tarballs should be available tomorrow.

Enjoy,
Stefan