too many main.c files, renamed to match elf output

src/minarch/makefile

@@ -2,7 +2,7 @@ ifeq (,$(CROSS_COMPILE))
 $(error missing CROSS_COMPILE for this toolchain)
 endif
 
-TARGET = minarch.elf
+TARGET = minarch
 
 CC = $(CROSS_COMPILE)gcc
 CFLAGS   = -marm -mtune=cortex-a9 -mfpu=neon-fp16 -mfloat-abi=hard -march=armv7-a -fomit-frame-pointer
@@ -17,6 +17,6 @@ BUILD_HASH!=git rev-parse --short HEAD
 CFLAGS += -DBUILD_DATE=\"${BUILD_DATE}\" -DBUILD_HASH=\"${BUILD_HASH}\"
 
 all:
-	$(CC) main.c ../common/scaler_neon.c ../common/utils.c ../common/api.c -o $(TARGET) $(CFLAGS) $(LDFLAGS)
+	$(CC) $(TARGET).c ../common/scaler_neon.c ../common/utils.c ../common/api.c -o $(TARGET).elf $(CFLAGS) $(LDFLAGS)
 clean:
-	rm -f $(TARGET)
+	rm -f $(TARGET).elf