Install symlink "otool" if LLVM_INSTALL_CCTOOLS_SYMLINKS is set

[jhenderson]

Seems reasonable to me.

llvm/tools/llvm-objdump/CMakeLists.txt

if(LLVM_HAVE_LIBXAR)
   target_link_libraries(llvm-objdump PRIVATE ${XAR_LIB})
 endif()
 
 add_llvm_tool_symlink(llvm-otool llvm-objdump)
 
 if(LLVM_INSTALL_BINUTILS_SYMLINKS)
   add_llvm_tool_symlink(objdump llvm-objdump)
 endif()
+
+if(LLVM_INSTALL_CCTOOLS_SYMLINKS)
+  add_llvm_tool_symlink(otool llvm-otool)
+endif()

llvm/utils/gn/secondary/llvm/tools/llvm-objdump/BUILD.gn

 import("//llvm/tools/binutils_symlinks.gni")
+import("//llvm/tools/cctools_symlinks.gni")
 import("//llvm/utils/TableGen/tablegen.gni")
 import("//llvm/utils/gn/build/symlink_or_copy.gni")
 
 tablegen("ObjdumpOpts") {
   visibility = [ ":llvm-objdump" ]
   args = [ "-gen-opt-parser-defs" ]
 }
 
 tablegen("OtoolOpts") {
   visibility = [ ":llvm-objdump" ]
   args = [ "-gen-opt-parser-defs" ]
 }
 
 symlinks = [ "llvm-otool" ]
 if (llvm_install_binutils_symlinks) {
   symlinks += [ "objdump" ]
 }
+if (llvm_install_cctools_symlinks) {
+  symlinks += [ "otool" ]
+}
 
 foreach(target, symlinks) {
   symlink_or_copy(target) {
     deps = [ ":llvm-objdump" ]
     source = "llvm-objdump"
     output = "$root_out_dir/bin/$target"
   }
 }