Get build system to work with Make 3.82

Note: `sort` can't seem to handle newlines in 3.82.

Change-Id: Ieeaee1d19688688a02e396bbc5b4dea26e7f6943
diff --git a/core/main.mk b/core/main.mk
index cfca47d..140e896 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -41,14 +41,16 @@
 # (Allow any version under Cygwin since we don't actually build the platform there.)
 ifeq (,$(findstring CYGWIN,$(shell uname -sm)))
 ifeq (0,$(shell expr $$(echo $(MAKE_VERSION) | sed "s/[^0-9\.].*//") = 3.81))
+ifeq (0,$(shell expr $$(echo $(MAKE_VERSION) | sed "s/[^0-9\.].*//") = 3.82))
 $(warning ********************************************************************************)
 $(warning *  You are using version $(MAKE_VERSION) of make.)
-$(warning *  Android can only be built by version 3.81.)
+$(warning *  Android can only be built by versions 3.81 and 3.82.)
 $(warning *  see http://source.android.com/source/download.html)
 $(warning ********************************************************************************)
 $(error stopping)
 endif
 endif
+endif
 
 TOP := .
 TOPDIR :=