change building the test on windows with clang

Author: grisuthedragon

.github/workflows/build-msys2.yml

@@ -82,7 +82,7 @@ jobs:
         -D CMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
         -D CMAKE_INSTALL_PREFIX=${{github.workspace}}/lapack_install
         -D SLICOT_TESTING:BOOL=ON
-        -D SLICOT_BUILD_SHARED_LIBS:BOOL=OFF
+        -D SLICOT_BUILD_SHARED_LIBS:BOOL=${{ matrix.os.fortran == 'flang' && 'OFF' || 'ON' }}
         -D CMAKE_EXE_LINKER_FLAGS="-Wl,--stack=2097152"