mdm9x15: Using gpio49 to read boot config5 as fastboot key

Boot config5 dip switch is used for a trigger to enter
fastboot for 9x15 MTP.

Change-Id: I031581c72feb3935e789750d7465b88d3bb350ab
diff --git a/target/mdm9615/rules.mk b/target/mdm9615/rules.mk
index 6ab270b..605bc63 100644
--- a/target/mdm9615/rules.mk
+++ b/target/mdm9615/rules.mk
@@ -29,4 +29,5 @@
 
 OBJS += \
 	$(LOCAL_DIR)/init.o \
-	$(LOCAL_DIR)/atags.o
+	$(LOCAL_DIR)/atags.o \
+	$(LOCAL_DIR)/keypad.o