remove download scripts, consolidate into script

most of them were just calling the gitclone script,
so remove them.

the grub script was treating gnulib as a dependency.
i've now added the ability to grab 1 dependency, in
the gitclone script (it should be expanded later to
support multiple dependencies)

the gitclone script has been renamed to "fetch".
the "fetch_trees" script does more or less the same
thing, but calls "fetch" and handles multiple revisions
if a project needs that

this is more efficient, and slightly reduces the code
size of lbmk!

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

resources/scripts/build/module/bios_extract

@@ -25,7 +25,7 @@ set -u -e
 # --------------------------------------------------------------------
 
 if [ ! -d "bios_extract/" ]; then
-    ./download bios_extract
+    ./fetch bios_extract
 fi
 
 printf "Building bios_extract\n"

resources/scripts/build/module/flashrom

@@ -29,7 +29,7 @@ set -u -e
 # --------------------------------------------------------------------
 
 if [ ! -d "flashrom/" ]; then
-    ./download flashrom
+    ./fetch flashrom
 fi
 
 printf "Building flashrom\n"

resources/scripts/build/module/grub

@@ -27,7 +27,7 @@ main()
 	printf "Building GRUB\n"
 
 	if [ ! -d "grub/" ]; then
-		./download grub || exit 1
+		./fetch grub || exit 1
 	fi
 
 	build_grub

resources/scripts/build/module/memtest86plus

@@ -31,7 +31,7 @@ set -u -e
 printf "Building MemTest86+\n"
 
 if [ ! -d "memtest86plus/" ]; then
-	./download memtest86plus
+	./fetch memtest86plus
 fi
 
 make -j$(nproc) -BC memtest86plus

resources/scripts/build/module/uefitool

@@ -24,7 +24,7 @@ set -u -e
 main()
 {
 	if [ ! -d "uefitool" ]; then
-		./download uefitool || fail "cannot download uefitool"
+		./fetch uefitool || fail "cannot download uefitool"
 	fi
 
 	printf "Building uefitool (UEFIExtract)\n"