LoopVectorize: Mark crash test as requiring assertions

Author: d0k

llvm/test/Transforms/LoopVectorize/X86/pr72969.ll

@@ -1,5 +1,6 @@
 ; RUN: not --crash opt -mtriple=x86_64 -mattr=-avx,-avx2,-avx512f,+sse,-sse2,-sse3,-sse4.2 -passes=loop-vectorize -S < %s
 ; RUN: not --crash opt -mtriple=x86_64 -mattr=-avx,-avx2,-avx512f,+sse,-sse2,-sse3,-sse4.2 -passes=loop-vectorize -force-vector-width=4 -S < %s
+; REQUIRES: asserts
 
 @h = global i64 0