Profiling tests: Endianess XFAIL for powerpc- (32-bit)

Add powerpc- (32-bit) as XFAIL for tests that are documented either in-
line or via commit messages as expected to fail on big-endian systems.

Tests not documented in-line are documented in commit messages as
follows:
r211172 - test/tools/llvm-cov/llvm-cov.test
r247920 - test/Transforms/SampleProfile/gcc-simple.ll

llvm-svn: 322114
diff --git a/llvm/test/Transforms/SampleProfile/gcc-simple.ll b/llvm/test/Transforms/SampleProfile/gcc-simple.ll
index cbd105e..fb40af4 100644
--- a/llvm/test/Transforms/SampleProfile/gcc-simple.ll
+++ b/llvm/test/Transforms/SampleProfile/gcc-simple.ll
@@ -1,6 +1,6 @@
 ; RUN: opt < %s -sample-profile -sample-profile-file=%S/Inputs/gcc-simple.afdo -S | FileCheck %s
 ; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/gcc-simple.afdo -S | FileCheck %s
-; XFAIL: powerpc64-, s390x, mips-, mips64-, sparc
+; XFAIL: powerpc-, powerpc64-, s390x, mips-, mips64-, sparc
 ; Original code:
 ;
 ; #include <stdlib.h>