Fix Moblab script installation paths

Cannot expect the paths to have slashes.
Also standardizing brackets in Makefiles

BUG=b:302363885
TEST=built image locally and seeing the scripts in expected places

Change-Id: Ibc8b1718fbd1be66f8b79a0cb811c6f211951201
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/moblab/+/4973994
Commit-Queue: Varun Thammineni <varunth@google.com>
Reviewed-by: Varun Thammineni <varunth@google.com>
Tested-by: Varun Thammineni <varunth@google.com>
Auto-Submit: Michal Matyjek <mmatyjek@google.com>
Tested-by: Michal Matyjek <mmatyjek@google.com>
diff --git a/os-dependent/chromeos/Makefile b/os-dependent/chromeos/Makefile
index f93a018..7d7c462 100644
--- a/os-dependent/chromeos/Makefile
+++ b/os-dependent/chromeos/Makefile
@@ -31,10 +31,10 @@
 	        ${PROTO}
 
 install:
-	@mkdir -p $(DESTDIR)usr/bin
-	install $(TMPDIR)/reset_usb ${DESTDIR}usr/bin
-	install -t ${DESTDIR}etc/moblab/host_server -D ${PROTO_OUT_DIR}/*
-	install -D host_server_chromeos.py ${DESTDIR}etc/moblab/host_server
-	install -D ../common/host*.py ${DESTDIR}etc/moblab/host_server
-	@mkdir -p ${DESTDIR}etc/moblab/host_server/utils
-	install -D ../common/utils/*.py ${DESTDIR}etc/moblab/host_server/utils
+	@mkdir -p $(DESTDIR)/usr/bin
+	install $(TMPDIR)/reset_usb $(DESTDIR)/usr/bin
+	install -t $(DESTDIR)/etc/moblab/host_server -D ${PROTO_OUT_DIR}/*
+	install -D host_server_chromeos.py $(DESTDIR)/etc/moblab/host_server
+	install -D ../common/host*.py $(DESTDIR)/etc/moblab/host_server
+	@mkdir -p $(DESTDIR)/etc/moblab/host_server/utils
+	install -D ../common/utils/*.py $(DESTDIR)/etc/moblab/host_server/utils
diff --git a/os-dependent/chromeos/upstart-scripts/Makefile b/os-dependent/chromeos/upstart-scripts/Makefile
index 00385bb..87f46a7 100644
--- a/os-dependent/chromeos/upstart-scripts/Makefile
+++ b/os-dependent/chromeos/upstart-scripts/Makefile
@@ -5,4 +5,4 @@
 all:
 
 install:
-	install -m 0644 -t ${DESTDIR}etc/init -D *.conf
+	install -m 0644 -t $(DESTDIR)/etc/init -D *.conf
diff --git a/src/tools/Makefile b/src/tools/Makefile
index 63f2ec4..7aba337 100644
--- a/src/tools/Makefile
+++ b/src/tools/Makefile
@@ -5,5 +5,5 @@
 all:
 
 install:
-	install -t ${DESTDIR}etc/moblab/tools/ -D *.py
+	install -t $(DESTDIR)/etc/moblab/tools/ -D *.py