XS RFR: 8008424: Isolate PROFILE make variable from incidental setting in the environment

[David Holmes]

A very simple follow up fix for the Profiles work that prevents a 
conflict between an unrelated environment variable and the make variable:

http://cr.openjdk.java.net/~dholmes/8008424/webrev/

Inline:

--- old/makefiles/BuildJdk.gmk	2013-02-18 21:32:55.022943673 -0500
+++ new/makefiles/BuildJdk.gmk	2013-02-18 21:32:53.698869592 -0500
@@ -91,10 +91,11 @@
  	+$(MAKE) -f CopySamples.gmk

  # Create the final jdk and jre images, to be wrapped up
-# into packages, or installed.
+# into packages, or installed. Ensure PROFILE is not set
+# in these cases.
  images:
-	+$(MAKE) -f CreateJars.gmk
-	+$(MAKE) -f Images.gmk
+	+$(MAKE) PROFILE="" -f CreateJars.gmk
+	+$(MAKE) PROFILE="" -f Images.gmk
  ifeq ($(OPENJDK_TARGET_OS), macosx)
  	+$(MAKE) -f Bundles.gmk
  endif


Thanks,
David