fix IPOPT finder for windows

6 jobs for CMakeTargetDebugging in 7 minutes and 21 seconds (queued for 1 second)
Status Name Job ID Coverage
  Test
passed clang-c++11 #68371
Linux

00:07:21

canceled CoMISo-VS2013-Qt-5.5.1-x64 #68373
VS2013 Qt551

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

00:01:22

passed gcc-c++11 #68370
Linux

00:06:45

failed macos-c++11 #68372
Apple

00:01:42

 
  Deploy
skipped trigger_build #68375
 
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