[Utils] Add missing freeze and poison keyword highlights

This patch adds missing keyword highlights for freeze and poison

Reviewed By: MaskRay, porglezomp

Differential Revision: https://reviews.llvm.org/D104017

llvm/utils/vim/syntax/llvm.vim

@@ -26,7 +26,7 @@ syn keyword llvmStatement add addrspacecast alloca and arcp ashr atomicrmw
 syn keyword llvmStatement bitcast br catchpad catchswitch catchret call callbr
 syn keyword llvmStatement cleanuppad cleanupret cmpxchg eq exact extractelement
 syn keyword llvmStatement extractvalue fadd fast fcmp fdiv fence fmul fpext
-syn keyword llvmStatement fptosi fptoui fptrunc free frem fsub fneg getelementptr
+syn keyword llvmStatement fptosi fptoui fptrunc free freeze frem fsub fneg getelementptr
 syn keyword llvmStatement icmp inbounds indirectbr insertelement insertvalue
 syn keyword llvmStatement inttoptr invoke landingpad load lshr malloc max min
 syn keyword llvmStatement mul nand ne ninf nnan nsw nsz nuw oeq oge ogt ole

llvm/utils/vscode/llvm/syntaxes/ll.tmLanguage.yaml

@@ -67,6 +67,7 @@ patterns:
             \\bfptrunc\\b|\
             \\bfree\\b|\
             \\bfrem\\b|\
+            \\bfreeze\\b|\
             \\bfsub\\b|\
             \\bfneg\\b|\
             \\bgetelementptr\\b|\
@@ -335,6 +336,7 @@ patterns:
             \\bnull\\b|\
             \\bzeroinitializer\\b|\
             \\bundef\\b|\
+            \\bpoison\\b|\
             \\bnull\\b|\
             \\bnone\\b"
     name: constant.language