RFR: JDK-8057132: Build fails if PROFILE is set in the environment

[Erik Joelsson]

Hello,

Please review this small fix for minor regression in the source reorg 
change. Before the change, BuildJdk.gmk would explicitly set PROFILE="" 
when calling CreateJars.gmk or Images.gmk for a normal image build. This 
did not make it over to Main.gmk.

Bug: https://bugs.openjdk.java.net/browse/JDK-8057132
Patch inline:

diff -r 3736cf40d962 make/Main.gmk
--- a/make/Main.gmk
+++ b/make/Main.gmk
@@ -236,11 +236,11 @@

  # Creates the jar files (rt.jar resources.jar etc)
  main-jars:
-    +($(CD) $(JDK_TOPDIR)/make && $(MAKE) $(MAKE_ARGS) -f CreateJars.gmk)
+    +($(CD) $(JDK_TOPDIR)/make && $(MAKE) $(MAKE_ARGS) PROFILE="" -f 
CreateJars.gmk)

  # Creates the images (j2sdk-image j2re-image etc)
  images:
-    +($(CD) $(JDK_TOPDIR)/make && $(MAKE) $(MAKE_ARGS) -f Images.gmk)
+    +($(CD) $(JDK_TOPDIR)/make && $(MAKE) $(MAKE_ARGS) PROFILE="" -f 
Images.gmk)
          ifeq ($(OPENJDK_TARGET_OS), macosx)
        +($(CD) $(JDK_TOPDIR)/make && $(MAKE) $(MAKE_ARGS) -f Bundles.gmk)
          endif