Preserve the isl-noexceptions.h C++ bindings when updating isl

The bindings currently need to be generated manually, as they are not yet
part of the official isl distribution. Hence, we keep them across updates
assuming they only need to be updated when new functions or functionality
should be exposed.

llvm-svn: 297710

polly/lib/External/update-isl.sh

@@ -23,8 +23,11 @@ mkdir -p $BUILDDIR
 
 for DISTFILE in "$BUILDDIR/isl*.tar.gz"; do break; done
 
+cp $ISL_SOURCE_DIR/include/isl-noexceptions.h $TMPDIR/isl-noexceptions.h
+
 rm -rf $ISL_SOURCE_DIR
 mkdir -p $ISL_SOURCE_DIR
 tar -xf $DISTFILE --strip-components=1 --directory $ISL_SOURCE_DIR
+cp $TMPDIR/isl-noexceptions.h $ISL_SOURCE_DIR/include/
 
 rm -rf $TMPDIR