[Xtensa] Minor fixes.

Author: andreisfr

llvm/test/MC/Disassembler/Xtensa/code_density.txt

@@ -1,5 +1,5 @@
-# RUN: llvm-mc -triple=xtensa -mattr=+density -disassemble < %s | FileCheck -check-prefixes=CHECK-DENSITY %s
-# RUN: not llvm-mc -triple=xtensa -disassemble < %s 2>&1 | FileCheck --implicit-check-not=warning: -check-prefixes=CHECK-CORE %s
+# RUN: llvm-mc -triple=xtensa -mattr=+density -disassemble %s | FileCheck -check-prefixes=CHECK-DENSITY %s
+# RUN: not llvm-mc -triple=xtensa -disassemble %s 2>&1 | FileCheck --implicit-check-not=warning: -check-prefixes=CHECK-CORE %s
 
 #------------------------------------------------------------------------------
 # Verify that binary code is correctly disassembled with