Current.xml and friends are now .txt instead.

(and much much easier to read)

Change-Id: I31832069d4fd78a937802aa20d0b0861bf99768c
diff --git a/core/config.mk b/core/config.mk
index 3b0e92e..a8dbe30 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -349,7 +349,7 @@
     $(patsubst $(HISTORICAL_NDK_VERSIONS_ROOT)/android-ndk-r%,%, \
     $(wildcard $(HISTORICAL_NDK_VERSIONS_ROOT)/android-ndk-r*)))
 
-INTERNAL_PLATFORM_API_FILE := $(TARGET_OUT_COMMON_INTERMEDIATES)/PACKAGING/public_api.xml
+INTERNAL_PLATFORM_API_FILE := $(TARGET_OUT_COMMON_INTERMEDIATES)/PACKAGING/public_api.txt
 
 # This is the standard way to name a directory containing prebuilt target
 # objects. E.g., prebuilt/$(TARGET_PREBUILT_TAG)/libc.so