Firmware now builds in a VSCode "Remote Container"

src/bbserial/Makefile

@@ -5,7 +5,7 @@ ccflags-y:=-std=gnu99 -Wno-declaration-after-statement
 
 KPKG=raspberrypi-kernel_1.20171029-1.tar.gz
 KURL=https://github.com/dbrgn/linux-rpi/archive/$(KPKG)
-KDIR=linux-rpi-raspberrypi-kernel_1.20171029-1
+KDIR=/tmp/rpi-kernel
 export KERNEL=kernel7
 
 KOPTS=ARCH=arm CROSS_COMPILE=$(CROSS) -C $(KDIR)
@@ -14,7 +14,9 @@ all: $(KDIR)
 	$(MAKE) $(KOPTS) M=$(DIR) modules
 
 $(KDIR): $(KPKG)
-	tar xf $(KPKG)
+	rm -rf $(KDIR)
+	mkdir -p $(KDIR)
+	tar xf $(KPKG) -C $(KDIR) --strip-components 1
 	$(MAKE) $(KOPTS) bcm2709_defconfig
 	$(MAKE) $(KOPTS) modules_prepare