with intel 19.0.4 with vectorization I am getting spammed with warnings
like
```
deal-git/include/deal.II/lac/la_vector.templates.h(405): warning #15552:
loop was not vectorized with "simd"
```
I think this is safe to ignore.
# -w3415 the "always_inline" attribute is ignored on non-inline functions
# incorrectly triggered by inline functions in tensor.h
# -w15531 A portion of SIMD loop is serialized
+# -w15552 loop was not vectorized with "simd"
#
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd21")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd68")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd2651")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd3415")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd15531")
+ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd15552")
#
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