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

core/config.mk

@@ -532,8 +532,8 @@ endif  # pdk or fusion
 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).)

core/pdk_fusion_modules.mk

@@ -37,12 +37,14 @@ include $(BUILD_PREBUILT)
 
 # The source prebuilts are extracted in the rule of _pdk_fusion_stamp.
 # Use a touch rule to establish the dependency.
+ifndef PDK_FUSION_PLATFORM_DIR
 $(3) $(11) : $(_pdk_fusion_stamp)
 	$(hide) if [ ! -f $$@ ]; then \
 	  echo 'Error: $$@ does not exist. Check your platform.zip.' 1>&2; \
 	  exit 1; \
 	fi
 	$(hide) touch $$@
+endif
 endef
 
 # We don't have a LOCAL_PATH for the auto-generated modules, so let it be the $(BUILD_SYSTEM).