science/paraview: fix on 14-amd64

Clang 19 is needed, it fails with Clang 18.1.6:

ld: error: undefined symbol: vtktoken::Token::Token(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&)
>>> referenced by tokenize.cxx
>>>               CMakeFiles/tokenize.dir/tokenize.cxx.o:(main)

PR:		287346
Reported by:	kevinz5000 (at) gmail.com

science/paraview/Makefile

@@ -63,7 +63,7 @@ RUN_DEPENDS=	${PYNUMPY}	\
 		${PYTHON_SITELIBDIR}/matplotlib/pyplot.py:math/py-matplotlib@${PY_FLAVOR}
 
 USES=		alias cmake compiler:c++17-lang desktop-file-utils eigen:3 fortran gl gnome	\
-		jpeg localbase pkgconfig python qt:6 shebangfix sqlite tar:xz xorg
+		jpeg localbase llvm:min=19 pkgconfig python qt:6 shebangfix sqlite tar:xz xorg
 USE_GL=		glew opengl
 USE_GNOME=	libxml2
 USE_QT=		5compat base svg tools webengine