[msm] Update emmc_appsboot.mbn to EMMCBOOT.MBN

The modem bootloaders now look for EMMCBOOT.MBN instead of
emmc_appsboot.mbn for eMMC targets

Change-Id: I3a8a35bb83cba2d7429ff66192168e43a91f1504
diff --git a/AndroidBoot.mk b/AndroidBoot.mk
index dabd93c..13316ac 100644
--- a/AndroidBoot.mk
+++ b/AndroidBoot.mk
@@ -13,7 +13,7 @@
 
 
 ifeq ($(TARGET_USERIMAGES_USE_EXT2),true)
-TARGET_BOOTLOADER_EMMC := $(PRODUCT_OUT)/emmc_appsboot.mbn
+TARGET_BOOTLOADER_EMMC := $(PRODUCT_OUT)/EMMCBOOT.MBN
 BOOTLOADER_EMMC_OUT := $(TOP)/$(TARGET_OUT_INTERMEDIATES)/BOOTLOADER_EMMC_OBJ
 
 emmc_appsbootldr_clean: