Add support for parsing global asm blocks

llvm-svn: 25557
diff --git a/llvm/lib/AsmParser/Lexer.l b/llvm/lib/AsmParser/Lexer.l
index 5c3a0c0..34aae99 100644
--- a/llvm/lib/AsmParser/Lexer.l
+++ b/llvm/lib/AsmParser/Lexer.l
@@ -212,6 +212,7 @@
 volatile        { return VOLATILE; }
 align           { return ALIGN;  }
 section         { return SECTION; }
+asm             { return ASM_TOK; }
 
 cc              { return CC_TOK; }
 ccc             { return CCC_TOK; }