For XTARGET to work on targets not in the list,

there must also be an XFAIL line.  Fix a couple
examples of this.

llvm-svn: 72876

llvm/test/FrontendC/2009-01-20-k8.c

@@ -1,3 +1,4 @@
 // RUN: %llvmgcc %s -S -march=k8
 // XTARGET: x86
+// XFAIL: *
 long double x;

llvm/test/FrontendC/2009-05-04-EnumInreg.c

@@ -1,4 +1,5 @@
 // RUN: %llvmgcc -S -m32 -mregparm=3 %s -emit-llvm -o - | grep {inreg %action}
+// XFAIL: *
 // XTARGET: x86
 // PR3967