Fix pre-extracted PDKs

The PDK unzip logic does not place all the files in the same directory
it would place a zipfile, but instead inside a directory of the same
name:

  a/b/platform.zip!pdk.mk

turns into:

  a/b/platform/pdk.mk

So fix the PDK_FUISON_PLATFORM_DIR autodetection to take this into
account. Also don't create touch rules for the pre-extracted java files.

Bug: 118776469
Test: try building the PDK with PDK_FUSION_PLATFORM_ZIP set, and files extracted
Change-Id: Ib27d12aba773a5e6bd41fcbe8945a0bc31b8c281
diff --git a/core/config.mk b/core/config.mk
index 0e38dbe..c1ea5a8 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -532,8 +532,8 @@
 ifdef PDK_FUSION_PLATFORM_ZIP
 TARGET_BUILD_PDK := true
 ifeq (,$(wildcard $(PDK_FUSION_PLATFORM_ZIP)))
-  ifneq (,$(wildcard $(dir $(PDK_FUSION_PLATFORM_ZIP))/pdk.mk))
-    PDK_FUSION_PLATFORM_DIR := $(dir $(PDK_FUSION_PLATFORM_ZIP))
+  ifneq (,$(wildcard $(patsubst %.zip,%,$(PDK_FUSION_PLATFORM_ZIP))/pdk.mk))
+    PDK_FUSION_PLATFORM_DIR := $(patsubst %.zip,%,$(PDK_FUSION_PLATFORM_ZIP))
     PDK_FUSION_PLATFORM_ZIP :=
   else
     $(error Cannot find file $(PDK_FUSION_PLATFORM_ZIP).)