Do not use builtin mkdepend for OS/2 until they've ported it. Fixes OS/2 tinderbox bustage caused by previous checkin for bug #66529 r=mkaply

config/config.mk

@@ -412,9 +412,11 @@ else
 MKDEPEND_DIR	= $(DEPTH)/config/mkdepend
 MKDEPEND	= $(MKDEPEND_DIR)/mkdepend
 ifndef COMPILER_DEPEND
+ifneq ($(OS_ARCH),OS2)
 MKDEPEND_BUILTIN = $(MKDEPEND_DIR)/mkdepend
 endif
 endif
+endif
 
 MKDEPENDENCIES	= depend.mk
 

config/rules.mk

@@ -1269,7 +1269,7 @@ else
 
 ifndef MOZ_NATIVE_MAKEDEPEND
 $(MKDEPEND_BUILTIN):
-	$(MAKE) -C $(DEPTH)/config nsinstall
+	$(MAKE) -C $(DEPTH)/config nsinstall$(BIN_SUFFIX)
 	$(MAKE) -C $(MKDEPEND_DIR) mkdepend
 endif