Update README.vortex

Author: tinebp

README.vortex

@@ -8,4 +8,4 @@
 - cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX=$POCL_PATH -DWITH_LLVM_CONFIG=$LLVM_PREFIX/bin/llvm-config -DVORTEX_PREFIX=$VORTEX_PREFIX -DENABLE_VORTEX=ON -DKERNEL_CACHE_DEFAULT=OFF -DENABLE_HOST_CPU_DEVICES=OFF -DENABLE_TESTS=OFF -DPOCL_DEBUG_MESSAGES=ON -DENABLE_ICD=OFF ..
 - make -j`nproc`
 - make install
-- cp -r ../include $POCL_RT_PATH
+- cp -r ../include $POCL_PATH