Add fr_FR.UTF-8 locale needed for compilation to the manifest

locales/fr_FR.UTF-8.scm

+(make-glibc-utf8-locales
+  glibc
+  #:locales (list "fr_FR")
+  #:name "glibc-fr-fr-utf8-locales")

manifest.scm

@@ -8,17 +8,20 @@
              ((gnu packages tex) #:select (texlive)))
 
 (let ((pandoc-fignos (load "pandoc-fignos.scm")))
-  (packages->manifest
-    (list coreutils
-          gcc-toolchain
-          ghc
-          ghc-attoparsec
-          glibc-locales
-          gnu-make
-          graphviz
-          pandoc
-          pandoc-fignos
-          poppler
-          python
-          sed
-          texlive)))
+  (concatenate-manifests
+    (list (packages->manifest
+            (list coreutils
+                  gcc-toolchain
+                  ghc
+                  ghc-attoparsec
+                  (load "locales/fr_FR.UTF-8.scm")
+                  gnu-make
+                  graphviz
+                  pandoc
+                  pandoc-fignos
+                  poppler
+                  python
+                  sed
+                  texlive))
+          (manifest
+            (list (package->manifest-entry gcc-toolchain "static"))))))