build/release/src: re-create symlinks, don't copy

if you copy a symlink, you create a whole new file with the
contents of what that symlink points to.

what we need to do instead is re-create the symlinks. this
is relevant for all symlinks to the main lbmk script, from
the main directory of lbmk.git.

this avoids there being multiple copies of the main lbmk
script, in release archives.

Signed-off-by: Leah Rowe <leah@libreboot.org>

script/build/release/src

@@ -30,9 +30,9 @@ simple_fetch_list="flashrom grub memtest86plus me_cleaner uefitool"
 simple_fetch_list="${simple_fetch_list} bios_extract biosutilities"
 
 dirlist="config util script include"
-
-filelist="lbmk modify build README.md COPYING update version handle"
-filelist="${filelist} versiondate projectname checkgit checkversion"
+linklist="build update handle" # symlinks in main directory, to script: lbmk
+filelist="lbmk README.md COPYING version versiondate projectname checkgit"
+filelist="${filelist} checkversion"
 
 version="version-unknown"
 versiondate="version-date-unknown"
@@ -123,6 +123,13 @@ copy_files()
 		cp "${i}" "${srcdir}/" || \
 		    err "copy_files: !cp ${i} ${srcdir}/"
 	done
+	(
+	cd "${srcdir}/" || err "copy_files: can't enter dir: ${srcdir}/"
+	for i in ${linklist}; do
+		ln -s lbmk "${i}" || \
+		    err "copy_files: cannot create symlink: ${i} -> lbmk"
+	done
+	)
 }
 
 purge_files()