tzdata: add to TWRP build automatically

Fixes "__bionic_open_tzdata" errors in recovery log

Use "TW_EXCLUDE_TZDATA := true" flag to exclude from build
if needed for space reasons. Will automatically be excluded
is "TW_OEM_BUILD := true" flag is present

Change-Id: I2f4a0f3a354a32c2f4f9733b3e88beedc4773020
diff --git a/prebuilt/Android.mk b/prebuilt/Android.mk
index c2d2090..9885f3e 100755
--- a/prebuilt/Android.mk
+++ b/prebuilt/Android.mk
@@ -504,3 +504,19 @@
         $(error magiskboot prebuilts not present; exiting)
     endif
 endif
+
+# Include tzdata in TWRP to fix "__bionic_open_tzdata" log spam
+# Dummy file to apply post-install patch
+ifneq ($(TW_EXCLUDE_TZDATA), true)
+    include $(CLEAR_VARS)
+    LOCAL_MODULE := tzdata_twrp
+    LOCAL_MODULE_TAGS := optional
+    LOCAL_MODULE_CLASS := ETC
+    LOCAL_MODULE_PATH := $(TARGET_ROOT_OUT)/system/bin
+    LOCAL_REQUIRED_MODULES := tzdata
+
+    LOCAL_POST_INSTALL_CMD += \
+        mkdir -p $(TARGET_RECOVERY_ROOT_OUT)/system/usr/share/zoneinfo; \
+        cp -f $(TARGET_OUT)/usr/share/zoneinfo/tzdata $(TARGET_RECOVERY_ROOT_OUT)/system/usr/share/zoneinfo/;
+    include $(BUILD_PHONY_PACKAGE)
+endif