manifest.scm: Add utf8 glibc-locals for US and CA

manifest.scm

@@ -1,3 +1,13 @@
+(define minimum-glibc-locales
+  (make-glibc-utf8-locales
+   glibc
+   #:locales (list "en_US" "en_CA")
+   #:name "glibc-english-canadian-and-us-utf8-locales"))
+
+(concatenate-manifests
+ (list
+  (packages->manifest
+   (list minimum-glibc-locales))
   (specifications->manifest
    (list
     "bash"
@@ -9,4 +19,4 @@
     "node"
     "nss-certs"
     "openssh"
-  "sed"))
+    "sed"))))