[OPENMP5.1]Initial support for novariants clause.
Added basic parsing/sema/serialization support for the 'novariants' clause.

GitOrigin-RevId: cb424fee3d6b27dbd38de666382b702100935286
diff --git a/lib/Semantics/check-omp-structure.cpp b/lib/Semantics/check-omp-structure.cpp
index 3ed8613..dfd44b7 100644
--- a/lib/Semantics/check-omp-structure.cpp
+++ b/lib/Semantics/check-omp-structure.cpp
@@ -729,6 +729,7 @@
 CHECK_SIMPLE_CLAUSE(Write, OMPC_write)
 CHECK_SIMPLE_CLAUSE(Init, OMPC_init)
 CHECK_SIMPLE_CLAUSE(Use, OMPC_use)
+CHECK_SIMPLE_CLAUSE(Novariants, OMPC_novariants)
 
 CHECK_REQ_SCALAR_INT_CLAUSE(Allocator, OMPC_allocator)
 CHECK_REQ_SCALAR_INT_CLAUSE(Grainsize, OMPC_grainsize)