build/release/src: Include U-Boot sources in source archive

Add U-Boot to the source release script's modules list so that it is
included in source release tarballs. Don't include the unused upstream
source and .git directories.

Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>

resources/scripts/build/release/src

@@ -53,7 +53,7 @@ mkdir -p "${srcdir}/"
 
 printf "%s" "${version}" > "${srcdir}"/version
 
-modlist="coreboot flashrom grub memtest86plus seabios ich9utils me_cleaner"
+modlist="coreboot flashrom grub memtest86plus seabios ich9utils me_cleaner u-boot"
 dirlist="resources" # do not add blobs directory here. it is handled below
 filelist="blobutil modify download build README.md COPYING Makefile update version versiondate projectname .gitcheck"
 
@@ -107,6 +107,7 @@ done
     rm -Rf coreboot/coreboot/
     rm -Rf .git* */.git* coreboot/*/.git* coreboot/*/3rdparty/*/.git*
     rm -Rf coreboot/*/util/nvidia/cbootimage/.git*
+    rm -Rf u-boot/u-boot/ u-boot/*/.git*
 )
 
 (