ninja&make/mac: Give loadable_modules type MH_BUNDLE.

pylib/gyp/generator/make.py

Index: pylib/gyp/generator/make.py
===================================================================
--- pylib/gyp/generator/make.py	(revision 1715)
+++ pylib/gyp/generator/make.py	(working copy)
@@ -166,15 +166,11 @@
 quiet_cmd_link = LINK($(TOOLSET)) $@
 cmd_link = $(LINK.$(TOOLSET)) $(GYP_LDFLAGS) $(LDFLAGS.$(TOOLSET)) -o "$@" $(LD_INPUTS) $(LIBS)
 
-# TODO(thakis): Find out and document the difference between shared_library and
-# loadable_module on mac.
 quiet_cmd_solink = SOLINK($(TOOLSET)) $@
 cmd_solink = $(LINK.$(TOOLSET)) -shared $(GYP_LDFLAGS) $(LDFLAGS.$(TOOLSET)) -o "$@" $(LD_INPUTS) $(LIBS)
 
-# TODO(thakis): The solink_module rule is likely wrong. Xcode seems to pass
-# -bundle -single_module here (for osmesa.so).
 quiet_cmd_solink_module = SOLINK_MODULE($(TOOLSET)) $@
-cmd_solink_module = $(LINK.$(TOOLSET)) -shared $(GYP_LDFLAGS) $(LDFLAGS.$(TOOLSET)) -o $@ $(filter-out FORCE_DO_CMD, $^) $(LIBS)
+cmd_solink_module = $(LINK.$(TOOLSET)) -bundle $(GYP_LDFLAGS) $(LDFLAGS.$(TOOLSET)) -o $@ $(filter-out FORCE_DO_CMD, $^) $(LIBS)
 """
 
 LINK_COMMANDS_ANDROID = """\