Make ./mach package usable

- without options, `strip` strips all sections containing `.comment` section.
- Haiku's dynamic loader uses this section to check what architecture of library is required from binary. If absent, it implies 32bit version of library.
- Then, firefox failed to start by failing to check on 64bit only depending library (c.f. libplds4.so).
- This commit works around this by specifying `strip` option not to remove `.comment` section.

moz.configure

@@ -879,6 +879,8 @@ def strip_flags(flags, profiling, target):
     # On Darwin, it tries to strip things it can't, so we need to limit its scope.
     elif target.kernel == "Darwin":
         return ["-x", "-S"]
+    elif target.kernel == "Haiku":
+        return ["--strip-debug"]
 
 
 set_config("STRIP_FLAGS", strip_flags)