general code cleanup on lbmk shell scripts

in update/blobs/download, i saw instances where
appdir was being deleted with rm -r, but the more
appropriate command would rm -Rf. this is now fixed.

other than that, i've mostly just simplified a bunch
of if statements and consolidated some duplicated
logic (e.g. if/else block for dependencies in
build_dependencies() of update/blobs/download

one or two functions and/or variables have been
renamed, for greater clarity in the code, also
removed a few messages that were redundant

used printf instead of echo, in a few places, also
fixed up the indentation in a few places

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

resources/scripts/build/grub/utils

@@ -25,11 +25,7 @@ set -u -e
 main()
 {
 	printf "Building GRUB\n"
-
-	if [ ! -d "grub/" ]; then
-		./fetch grub || exit 1
-	fi
-
+	[ -d "grub/" ] || ./fetch grub || exit 1
 	build_grub
 }
 
@@ -37,15 +33,8 @@ build_grub()
 {
 	(
 	cd grub/ || err "cd"
-
-	# clean up first
-	if [ -d Makefile ]; then
-		make distclean || err "make-distclean"
-	fi
-
+	[ ! -d Makefile ] || make distclean || err "make-distclean"
 	./bootstrap --gnulib-srcdir=gnulib/ --no-git || err "bootstrap"
-
-	# build
 	./autogen.sh || err "autogen"
 	./configure --with-platform=coreboot || err "configure"
 	make -j$(nproc) || err "make"