pack: fix conflicting dirs for RPM

There is an issue with installing packed RPM on CentOS7:
conflicting systemd directoriies with systemd RPM. Skip adding these
dirs to an RPM package.

Author: psergee

cli/pack/rpm_const.go

@@ -91,26 +91,28 @@ var (
 
 	systemDirs = map[string]struct{}{
 		// in fact, all this dirs has leading '/'
-		".":                    struct{}{},
-		"bin":                  struct{}{},
-		"usr":                  struct{}{},
-		"usr/bin":              struct{}{},
-		"usr/local":            struct{}{},
-		"usr/local/bin":        struct{}{},
-		"usr/share":            struct{}{},
-		"usr/share/tarantool":  struct{}{},
-		"usr/lib":              struct{}{},
-		"usr/lib/tmpfiles.d":   struct{}{},
-		"var":                  struct{}{},
-		"var/lib":              struct{}{},
-		"var/lib/tarantool":    struct{}{},
-		"var/run":              struct{}{},
-		"var/log":              struct{}{},
-		"etc":                  struct{}{},
-		"etc/tarantool":        struct{}{},
-		"etc/tarantool/conf.d": struct{}{},
-		"etc/systemd":          struct{}{},
-		"etc/systemd/system":   struct{}{},
+		".":                      struct{}{},
+		"bin":                    struct{}{},
+		"usr":                    struct{}{},
+		"usr/bin":                struct{}{},
+		"usr/local":              struct{}{},
+		"usr/local/bin":          struct{}{},
+		"usr/share":              struct{}{},
+		"usr/share/tarantool":    struct{}{},
+		"usr/lib":                struct{}{},
+		"usr/lib/tmpfiles.d":     struct{}{},
+		"var":                    struct{}{},
+		"var/lib":                struct{}{},
+		"var/lib/tarantool":      struct{}{},
+		"var/run":                struct{}{},
+		"var/log":                struct{}{},
+		"etc":                    struct{}{},
+		"etc/tarantool":          struct{}{},
+		"etc/tarantool/conf.d":   struct{}{},
+		"etc/systemd":            struct{}{},
+		"etc/systemd/system":     struct{}{},
+		"usr/lib/systemd":        struct{}{},
+		"usr/lib/systemd/system": struct{}{},
 	}
 
 	boundariesByType = map[rpmValueType]int{