Load only the current product config makefile.
To reduce the start time.
With the change and previous change of doing clean step in only given paths,
start time of mm/mmm is reduced from ~5s to about 1s;
lunch time is reduced from ~40s to 3.5s.
Bug: 7186768,7169854
Change-Id: Ifd72ba1c6362a5e1125a23c505fd47947ab56675
diff --git a/core/product.mk b/core/product.mk
index c0e6e3e..b934826 100644
--- a/core/product.mk
+++ b/core/product.mk
@@ -16,7 +16,12 @@
#
# Functions for including AndroidProducts.mk files
-#
+# PRODUCT_MAKEFILES is set up in AndroidProducts.mks.
+# Format of PRODUCT_MAKEFILES:
+# <product_name>:<path_to_the_product_makefile>
+# If the <product_name> is the same as the base file name (without dir
+# and the .mk suffix) of the product makefile, "<product_name>:" can be
+# omitted.
#
# Returns the list of all AndroidProducts.mk files.