meta-openembedded/all: adapt to UNPACKDIR changes

Please see
https://git.yoctoproject.org/poky/commit/?id=4dd321f8b83afecd962393101b2a6861275b5265
for what changes are needed, and sed commands that can be used to make them en masse.

I've verified that bitbake -c patch world works with these, but did not run a world
build; the majority of recipes shouldn't need further fixups, but if there are
some that still fall out, they can be fixed in followups.

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-devtools/flatbuffers/python3-flatbuffers.bb

@@ -6,7 +6,7 @@ LIC_FILES_CHKSUM = "file://../LICENSE;md5=3b83ef96387f14655fc854ddc3c6bd57"
 
 require flatbuffers.inc
 
-S = "${WORKDIR}/git/python"
+S = "${UNPACKDIR}/${BP}/python"
 
 RDEPENDS:${PN} = "flatbuffers"