[vim] Update the syntax to mark REQUIRES lines and not talk about
dejagnu.

I wonder if it would be useful to handle FileCheck prefixes specially?
Especially if we could get some error checking. Suggestions welcome.
Patches more welcome as I have no idea what I'm doing with vim
script....

llvm-svn: 242267
diff --git a/llvm/utils/vim/syntax/llvm.vim b/llvm/utils/vim/syntax/llvm.vim
index 913d0f5..0e2cbd3 100644
--- a/llvm/utils/vim/syntax/llvm.vim
+++ b/llvm/utils/vim/syntax/llvm.vim
@@ -84,10 +84,10 @@
 syn match   llvmConstant /\<DW_VIRTUALITY_[a-z_]\+\>/
 syn match   llvmConstant /\<DIFlag[A-Za-z]\+\>/
 
-" Syntax-highlight dejagnu test commands.
-syn match  llvmSpecialComment /;\s*RUN:.*$/
+" Syntax-highlight lit test commands and bug numbers.
 syn match  llvmSpecialComment /;\s*PR\d*\s*$/
-syn match  llvmSpecialComment /;\s*END\.\s*$/
+syn match  llvmSpecialComment /;\s*REQUIRES:.*$/
+syn match  llvmSpecialComment /;\s*RUN:.*$/
 syn match  llvmSpecialComment /;\s*XFAIL:.*$/
 
 if version >= 508 || !exists("did_c_syn_inits")