[BOLT][test] Add missing stderr redirections

BOLT-ERROR and BOLT-WARNING messages are output to stderr which is not captured
by piping to FileCheck. Redirect stderr to stdout to fix that in tests.

Reviewed By: #bolt, maksfb

Differential Revision: https://reviews.llvm.org/D156340

Author: aaupov

bolt/test/X86/issue26.s

@@ -7,7 +7,7 @@
 # RUN: llvm-mc -filetype=obj -triple x86_64-unknown-unknown \
 # RUN:   %s -o %t.o
 # RUN: %clang %cflags %t.o -o %t.exe -Wl,-q
-# RUN: llvm-bolt %t.exe --relocs --print-cfg -o %t.out \
+# RUN: llvm-bolt %t.exe --relocs --print-cfg -o %t.out 2>&1 \
 # RUN:    | FileCheck %s
 
 # CHECK-NOT: BOLT-WARNING: CFG invalid in XYZ @ .LBB0

bolt/test/X86/issue26.test

@@ -1,7 +1,7 @@
 # This reproduces issue 26 from our github repo
 
 # RUN: yaml2obj %p/Inputs/issue26.yaml &> %t.exe
-# RUN: llvm-bolt %t.exe --relocs --print-cfg -o %t.out \
+# RUN: llvm-bolt %t.exe --relocs --print-cfg -o %t.out 2>&1 \
 # RUN:    | FileCheck %s
 
 CHECK-NOT: BOLT-WARNING: CFG invalid in XYZ @ .LBB0

bolt/test/runtime/X86/exceptions-instrumentation.test

@@ -9,7 +9,7 @@ RUN: %t.exc arg1 arg2 arg3
 
 RUN: llvm-bolt %t_exc_split -o %t.exc.bolted --data %t.fdata \
 RUN:   --reorder-blocks=ext-tsp --reorder-functions=hfsort+ \
-RUN:   --split-functions --split-eh=1 \
+RUN:   --split-functions --split-eh=1 2>&1 \
 RUN:   | FileCheck --check-prefix=EXCEPTIONS %s
 EXCEPTIONS-NOT: invalid (possibly stale) profile
 

bolt/test/runtime/meta-merge-fdata.test

@@ -22,7 +22,7 @@ CHECK-FDATA: 0 [unknown] 0 1 _start 0 0 1
 # Check that BOLT works with this profile
 RUN: llvm-bolt merge-fdata -o %t.bolt --data %t.fdata1 \
 RUN:   --reorder-blocks=ext-tsp --reorder-functions=hfsort+ \
-RUN:   --split-functions \
+RUN:   --split-functions 2>&1 \
 RUN:   | FileCheck %s --check-prefix=CHECK-BOLT1
 CHECK-BOLT1-NOT: invalid (possibly stale) profile
 
@@ -44,7 +44,7 @@ RUN: cmp %t.fdata.base %t.fdata.inst
 # Optimize using merged fdata
 RUN: llvm-bolt merge-fdata -o %t.opt --data %t.fdata.base \
 RUN:   --reorder-blocks=ext-tsp --reorder-functions=hfsort+ \
-RUN:   --split-functions \
+RUN:   --split-functions 2>&1 \
 RUN:   | FileCheck %s --check-prefix=CHECK-BOLT2
 CHECK-BOLT2-NOT: invalid (possibly stale) profile