The `@no_sanitize' attribute disables a particular sanitizer for this
function, analogous to `__attribute__((no_sanitize))'. The library also
defines `@noSanitize' to be compatible with the LLVM D compiler's
`ldc.attributes'.
gcc/d/ChangeLog:
* d-attribs.cc (d_langhook_attribute_table): Add no_sanitize.
(d_handle_no_sanitize_attribute): New function.
libphobos/ChangeLog:
* libdruntime/gcc/attributes.d (no_sanitize): Define.
(noSanitize): Define.
gcc/testsuite/ChangeLog:
* gdc.dg/asan/attr_no_sanitize1.d: New test.
* gdc.dg/ubsan/attr_no_sanitize2.d: New test.
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