build suitesparse-wrapper on appveyor

with a hack so the rest of suitesparse doesn't rebuild

contrib/windows/msys_build.sh

@@ -143,7 +143,7 @@ if [ -z "`which make 2>/dev/null`" ]; then
   export PATH=$PWD/bin:$PATH
 fi
 
-for lib in LLVM SUITESPARSE ARPACK BLAS LAPACK FFTW \
+for lib in LLVM ARPACK BLAS LAPACK FFTW \
     GMP MPFR PCRE LIBUNWIND RMATH OPENSPECFUN; do
   echo "USE_SYSTEM_$lib = 1" >> Make.user
 done
@@ -169,6 +169,7 @@ if [ -n "$USEMSVC" ]; then
 
   # Openlibm doesn't build well with MSVC right now
   echo 'USE_SYSTEM_OPENLIBM = 1' >> Make.user
+  echo 'USE_SYSTEM_SUITESPARSE = 1' >> Make.user
   # Since we don't have a static library for openlibm
   echo 'override UNTRUSTED_SYSTEM_LIBM = 0' >> Make.user
 
@@ -178,6 +179,12 @@ if [ -n "$USEMSVC" ]; then
   echo 'override CC += -TP' >> Make.user
 else
   echo 'override STAGE1_DEPS += openlibm' >> Make.user
+  echo 'override STAGE3_DEPS += suitesparse-wrapper' >> Make.user
+
+  # hack so all of suitesparse doesn't rebuild
+  make -C deps SuiteSparse-4.3.1/Makefile
+  touch deps/SuiteSparse-4.3.1/UMFPACK/Lib/libumfpack.a
+  touch usr/bin/libspqr.dll
 fi
 
 make -j2