[coreboot-gerrit] Change in coreboot[master]: Makefile: Create the build directory before bootblock.bin

[Martin Roth (Code Review)]

Martin Roth has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/35531 )

Change subject: Makefile: Create the build directory before bootblock.bin
......................................................................

Patch Set 3:

(1 comment)

https://review.coreboot.org/c/coreboot/+/35531/3/Makefile.inc 
File Makefile.inc:

https://review.coreboot.org/c/coreboot/+/35531/3/Makefile.inc@507 
PS3, Line 507: build-dirs $(objcbfs) $(objgenerated):
> I mean, that's how make is supposed to work? If it didn't before then maybe there was/is another hid […]

I added the actual directory variables because it was a pain trying to search to see what random phoney target name is creating the directory I needed.  Why have a phoney target when we can have real targets doing what Makefiles are supposed to do?

Maybe I should have gone through and gotten rid of all of the references to the build-dirs target.