fix IPOPT finder for windows

6 jobs for CMakeTargetDebugging in 7 minutes and 21 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
canceled #68373
Qt551 VS2013
CoMISo-VS2013-Qt-5.5.1-x64

passed #68374
IPOPT3129 VS2017
CoMISo-VS2017-Qt-5.10.1-x64

00:01:22

passed #68371
Linux
clang-c++11

00:07:21

passed #68370
Linux
gcc-c++11

00:06:45

failed #68372
Apple
macos-c++11

00:01:42

 
  Deploy
skipped #68375
trigger_build
 
Name Stage Failure
failed
macos-c++11 Test
[ 61%] Building CXX object CMakeFiles/CoMISo.dir/Utils/CoMISoError.cc.o
[ 62%] Building CXX object CMakeFiles/CoMISo.dir/QtWidgets/MISolverDialogUI.cc.o
[ 63%] Linking CXX shared library libCoMISo.dylib
ld: library not found for -lSuiteSparse
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [libCoMISo.dylib] Error 1
make[1]: *** [CMakeFiles/CoMISo.dir/all] Error 2
make: *** [all] Error 2
ERROR: Job failed: exit status 1