all: use internal objcopy implementation

This lessens the dependency on binutils (e.g. arm-none-eabi-objcopy).

Gopkg.lock

@@ -1,6 +1,14 @@
 # This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
 
 
+[[projects]]
+  branch = "master"
+  digest = "1:00b45e06c7843541372fc17d982242bd6adfc2fc382b6f2e9ef9ce53d87a50b9"
+  name = "github.com/marcinbor85/gohex"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "7a43cd876e46e0f6ddc553f10f91731a78e6e949"
+
 [[projects]]
   branch = "master"
   digest = "1:ba70784a3deee74c0ca3c87bcac3c2f93d3b2d27d8f237b768c358b45ba47da8"
@@ -25,6 +33,7 @@
   analyzer-name = "dep"
   analyzer-version = 1
   input-imports = [
+    "github.com/marcinbor85/gohex",
     "golang.org/x/tools/go/ast/astutil",
     "golang.org/x/tools/go/ssa",
     "tinygo.org/x/go-llvm",