[test] Use yaml2obj -o %t instead of > %t

To improve consistency and avoid unneeded shell feature (output
redirection).

While here, make other changes to improve consistency

--docnum 1 => --docnum=1
-docnum=x => --docnum=x
diff --git a/llvm/test/tools/llvm-lipo/replace-universal-binary.test b/llvm/test/tools/llvm-lipo/replace-universal-binary.test
index f9419ef..a3ce6a9 100644
--- a/llvm/test/tools/llvm-lipo/replace-universal-binary.test
+++ b/llvm/test/tools/llvm-lipo/replace-universal-binary.test
@@ -1,5 +1,5 @@
-# RUN: yaml2obj %p/Inputs/armv7-slice-big.yaml > %t-armv7big.o
-# RUN: yaml2obj %p/Inputs/i386-x86_64-armv7-arm64-universal.yaml > %t-universal.o
+# RUN: yaml2obj %p/Inputs/armv7-slice-big.yaml -o %t-armv7big.o
+# RUN: yaml2obj %p/Inputs/i386-x86_64-armv7-arm64-universal.yaml -o %t-universal.o
 
 # RUN: llvm-lipo %t-universal.o -replace armv7 %t-armv7big.o -o %t.o
 # RUN: llvm-objdump %t.o -m --universal-headers | FileCheck --check-prefix=ARMV7_BIG %s
@@ -20,8 +20,8 @@
 # ARMV7_BIG: size 516
 # ARMV7_BIG: align 2^14 (16384)
 
-# RUN: yaml2obj %p/Inputs/armv7-slice.yaml > %t-armv7.o
-# RUN: yaml2obj %p/Inputs/armv7_i386_non_default_alignment.yaml > %t-universal-align.o
+# RUN: yaml2obj %p/Inputs/armv7-slice.yaml -o %t-armv7.o
+# RUN: yaml2obj %p/Inputs/armv7_i386_non_default_alignment.yaml -o %t-universal-align.o
 
 # RUN: llvm-lipo %t-universal-align.o -replace armv7 %t-armv7.o -o %t2.o
 # RUN: llvm-objdump %t2.o -m --universal-headers | FileCheck --check-prefix=ARMV7_ALIGN_SWAP %s