PATH: Allow more tools

pkill and sleep are used in
device/generic/goldfish/tools/emulator_boot_test.sh

pgrep is used by GOMA

bc and pwd are used by kernel builds

Test: none
Change-Id: If7004255b4776fa4409fdd4b0aa6d6617b471317
diff --git a/ui/build/paths/config.go b/ui/build/paths/config.go
index f044971..4275601 100644
--- a/ui/build/paths/config.go
+++ b/ui/build/paths/config.go
@@ -59,6 +59,7 @@
 	"awk":       Allowed,
 	"basename":  Allowed,
 	"bash":      Allowed,
+	"bc":        Allowed,
 	"bzip2":     Allowed,
 	"cat":       Allowed,
 	"chmod":     Allowed,
@@ -98,7 +99,10 @@
 	"openssl":   Allowed,
 	"patch":     Allowed,
 	"perl":      Allowed,
+	"pgrep":     Allowed,
+	"pkill":     Allowed,
 	"pstree":    Allowed,
+	"pwd":       Allowed,
 	"python":    Allowed,
 	"python2.7": Allowed,
 	"python3":   Allowed,
@@ -114,6 +118,7 @@
 	"sha1sum":   Allowed,
 	"sha256sum": Allowed,
 	"sha512sum": Allowed,
+	"sleep":     Allowed,
 	"sort":      Allowed,
 	"stat":      Allowed,
 	"sum":       Allowed,