custom bootimage: Update path to RPM.bin

Change the path to RPM.bin to reflect the change I did in the
binary package release by Sony Mobile. The change was made because
all other files in etc/firmware are flashed into the file system.

Change-Id: I956aa700482e68f0ce8e5e1c9ebd51ca2dc63ddb
diff --git a/custombootimg.mk b/custombootimg.mk
index 50bc8cd..b627d9a 100644
--- a/custombootimg.mk
+++ b/custombootimg.mk
@@ -4,10 +4,10 @@
 INSTALLED_BOOTIMAGE_TARGET := $(PRODUCT_OUT)/boot.img
 $(INSTALLED_BOOTIMAGE_TARGET): $(PRODUCT_OUT)/kernel $(INSTALLED_RAMDISK_TARGET) $(MKBOOTIMG) $(MINIGZIP) $(INTERNAL_BOOTIMAGE_FILES)
 	$(call pretty,"Boot image: $@")
-	$(hide) python $(MKELF) -o $@ $(PRODUCT_OUT)/kernel@0x40208000 $(PRODUCT_OUT)/ramdisk.img@0x41300000,ramdisk vendor/sony/lt26/proprietary/etc/firmware/RPM.bin@0x20000,rpm
+	$(hide) python $(MKELF) -o $@ $(PRODUCT_OUT)/kernel@0x40208000 $(PRODUCT_OUT)/ramdisk.img@0x41300000,ramdisk vendor/sony/lt26/proprietary/boot/RPM.bin@0x20000,rpm
 
 INSTALLED_RECOVERYIMAGE_TARGET := $(PRODUCT_OUT)/recovery.img
 $(INSTALLED_RECOVERYIMAGE_TARGET): $(MKBOOTIMG) $(recovery_ramdisk) $(recovery_kernel)
 	$(call pretty,"Recovery image: $@")
-	$(hide) python $(MKELF) -o $@ $(PRODUCT_OUT)/kernel@0x40208000 $(PRODUCT_OUT)/ramdisk-recovery.img@0x41300000,ramdisk vendor/sony/lt26/proprietary/etc/firmware/RPM.bin@0x20000,rpm
+	$(hide) python $(MKELF) -o $@ $(PRODUCT_OUT)/kernel@0x40208000 $(PRODUCT_OUT)/ramdisk-recovery.img@0x41300000,ramdisk vendor/sony/lt26/proprietary/boot/RPM.bin@0x20000,rpm
 #	$(hide) $(call assert-max-image-size,$@,$(BOARD_RECOVERYIMAGE_PARTITION_SIZE),raw)