llvm-cov: Move XFAIL after the body of the test

llvm-cov tests are sensitive to line number changes, so putting this
at the end will limit churn when we fix the XFAIL.

llvm-svn: 204871

test/tools/llvm-cov/copy_block_helper.m

@@ -3,8 +3,6 @@
 
 // We need shell for cd
 // REQUIRES: shell
-// llvm-cov doesn't work on big endian yet
-// XFAIL: powerpc64, s390x, mips-, mips64-, sparc
 
 // RUN: rm -rf %t
 // RUN: mkdir %t
@@ -29,3 +27,6 @@ void test(id x) { // GCOV: -:    [[@LINE]]:void test
 
 // GCOV: 1:    [[@LINE+1]]:int main
 int main(int argc, const char *argv[]) { test(0); }
+
+// llvm-cov doesn't work on big endian yet
+// XFAIL: powerpc64, s390x, mips-, mips64-, sparc