[llvm-objcopy] Update help message tests

This diff merges help message tests for llvm-objcopy, llvm-strip and
llvm-install-name-tool.

Patch by Sameer Arora!

Test plan: make check-all

Differential revision: https://reviews.llvm.org/D82012

llvm/test/tools/llvm-objcopy/MachO/install-name-tool-help-message.test

-# RUN: llvm-install-name-tool -h | FileCheck --check-prefix=INSTALL-NAME-TOOL-USAGE %s --match-full-lines
-# RUN: llvm-install-name-tool --help | FileCheck --check-prefix=INSTALL-NAME-TOOL-USAGE %s --match-full-lines
-# RUN: not llvm-install-name-tool 2>&1 | FileCheck --check-prefix=INSTALL-NAME-TOOL-USAGE %s --match-full-lines
-# RUN: not llvm-install-name-tool -abcabc 2>&1 | FileCheck --check-prefix=UNKNOWN-ARG %s
-# RUN: not llvm-install-name-tool --abcabc 2>&1 | FileCheck --check-prefix=UNKNOWN-ARG %s
-
-# INSTALL-NAME-TOOL-USAGE: USAGE: llvm-install-name-tool [options] input
-# INSTALL-NAME-TOOL-USAGE: Pass @FILE as argument to read options from FILE.
-
-# UNKNOWN-ARG: unknown argument '{{-+}}abcabc'

llvm/test/tools/llvm-objcopy/ELF/help-message.test → llvm/test/tools/llvm-objcopy/tool-help-message.test

@@ -12,11 +12,21 @@
 # RUN: not llvm-strip --abcabc 2>&1 | FileCheck --check-prefix=UNKNOWN-ARG %s
 # RUN: not llvm-strip --strip-debug 2>&1 | FileCheck %s --check-prefix=NO-INPUT-FILES
 
+# RUN: llvm-install-name-tool -h | FileCheck --check-prefix=INSTALL-NAME-TOOL-USAGE %s --match-full-lines
+# RUN: llvm-install-name-tool --help | FileCheck --check-prefix=INSTALL-NAME-TOOL-USAGE %s --match-full-lines
+# RUN: not llvm-install-name-tool 2>&1 | FileCheck --check-prefix=INSTALL-NAME-TOOL-USAGE %s --match-full-lines
+# RUN: not llvm-install-name-tool -abcabc 2>&1 | FileCheck --check-prefix=UNKNOWN-ARG %s
+# RUN: not llvm-install-name-tool --abcabc 2>&1 | FileCheck --check-prefix=UNKNOWN-ARG %s
+# RUN: not llvm-install-name-tool -add_rpath @executable 2>&1 | FileCheck %s --check-prefix=NO-INPUT-FILES
+
 # OBJCOPY-USAGE:  USAGE: llvm-objcopy [options] input [output]
 # OBJCOPY-USAGE:  Pass @FILE as argument to read options from FILE.
 
 # STRIP-USAGE:    USAGE: llvm-strip [options] inputs...
 # STRIP-USAGE:    Pass @FILE as argument to read options from FILE.
 
+# INSTALL-NAME-TOOL-USAGE: USAGE: llvm-install-name-tool [options] input
+# INSTALL-NAME-TOOL-USAGE: Pass @FILE as argument to read options from FILE.
+
 # UNKNOWN-ARG:    unknown argument '{{-+}}abcabc'
 # NO-INPUT-FILES: no input file specified