build: swap otool for (llvm-)objdump

Similar to libtool, (llvm-)otool only exists with a version suffix
on some systems (Ubuntu), which makes it annoying to use/find. Avoid
this, by switching to objdump. Which is a drop-in replacement.

This is related to #21778, and the switchover to using vanilla LLVM for
macOS.

depends/hosts/darwin.mk

@@ -19,6 +19,8 @@ clang_prog=$(build_prefix)/bin/clang
 clangxx_prog=$(clang_prog)++
 llvm_config_prog=$(build_prefix)/bin/llvm-config
 
+darwin_OBJDUMP=$(build_prefix)/bin/$(host)-objdump
+
 else
 # FORCE_USE_SYSTEM_CLANG is non-empty, so we use the clang from the user's
 # system
@@ -37,9 +39,11 @@ clangxx_prog=$(shell $(SHELL) $(.SHELLFLAGS) "command -v clang++")
 llvm_config_prog=$(shell $(SHELL) $(.SHELLFLAGS) "command -v llvm-config")
 
 llvm_lib_dir=$(shell $(llvm_config_prog) --libdir)
+
+darwin_OBJDUMP=$(shell $(SHELL) $(.SHELLFLAGS) "command -v llvm-objdump")
 endif
 
-cctools_TOOLS=AR RANLIB STRIP NM OTOOL DSYMUTIL
+cctools_TOOLS=AR RANLIB STRIP NM DSYMUTIL
 
 # Make-only lowercase function
 lc = $(subst A,a,$(subst B,b,$(subst C,c,$(subst D,d,$(subst E,e,$(subst F,f,$(subst G,g,$(subst H,h,$(subst I,i,$(subst J,j,$(subst K,k,$(subst L,l,$(subst M,m,$(subst N,n,$(subst O,o,$(subst P,p,$(subst Q,q,$(subst R,r,$(subst S,s,$(subst T,t,$(subst U,u,$(subst V,v,$(subst W,w,$(subst X,x,$(subst Y,y,$(subst Z,z,$1))))))))))))))))))))))))))

depends/hosts/default.mk

@@ -38,5 +38,5 @@ host_$1 = $$($(host_arch)_$(host_os)_$1)
 host_$(release_type)_$1 = $$($(host_arch)_$(host_os)_$(release_type)_$1)
 endef
 
-$(foreach tool,CC CXX AR RANLIB STRIP NM OBJCOPY OTOOL DSYMUTIL,$(eval $(call add_host_tool_func,$(tool))))
+$(foreach tool,CC CXX AR RANLIB STRIP NM OBJCOPY OBJDUMP DSYMUTIL,$(eval $(call add_host_tool_func,$(tool))))
 $(foreach flags,CFLAGS CXXFLAGS CPPFLAGS LDFLAGS, $(eval $(call add_host_flags_func,$(flags))))