libbraiding: 1.2 -> 1.3.1, import sage update patch (#370861)

pkgs/by-name/li/libbraiding/package.nix

···
   stdenv,
   fetchFromGitHub,
   autoreconfHook,
+  pkg-config,
 }:
 
 stdenv.mkDerivation rec {
-  version = "1.2";
+  version = "1.3.1";
   pname = "libbraiding";
 
   src = fetchFromGitHub {
     owner = "miguelmarco";
     repo = "libbraiding";
-    rev = version;
-    sha256 = "sha256-cgg6rvlOvFqGjgbw6i7QXS+tqvfFd1MkPCEjnW/FyFs=";
+    # version 1.3.1 contains a typo in configure.ac, fixed in the next commit.
+    # TODO: remove if on upgrade
+    rev = if version == "1.3.1" then "b174832026c2412baec83277c461e4df71d8525c" else version;
+    hash = "sha256-ar/EiaMZuQRa1lr0sZPLRuk5K00j63TqNf0q0iuiKjw=";
   };
 
   nativeBuildInputs = [
     autoreconfHook
+    pkg-config
   ];
 
   # no tests included for now (2018-08-05), but can't hurt to activate

pkgs/by-name/sa/sage/sage-src.nix

···
     # a more conservative version of https://github.com/sagemath/sage/pull/37951
     ./patches/gap-element-crash.patch
 
-    # https://github.com/sagemath/sage/pull/38940, positively reviewed, to land in 10.6.beta0
+    # https://github.com/sagemath/sage/pull/38940, landed in 10.6.beta0
     (fetchpatch {
       name = "simplicial-sets-flaky-test.patch";
       url = "https://github.com/sagemath/sage/commit/1830861c5130d30b891e8c643308e1ceb91ce2b5.diff";
···
   # should come from or be proposed to upstream. This list will probably never
   # be empty since dependencies update all the time.
   packageUpgradePatches = [
+    # https://github.com/sagemath/sage/pull/38887, landed in 10.6.beta0
+    (fetchpatch {
+      name = "libbraiding-1.3-update.patch";
+      url = "https://github.com/sagemath/sage/commit/f10a6d04599795732c1d99e2da0a4839ccdcb4f5.diff";
+      hash = "sha256-xB0xg8dGLnSMdFK3/B5hkI9yzI5N3lUMhPZ89lDsp3s=";
+    })
   ];
 
   patches = nixPatches ++ bugfixPatches ++ packageUpgradePatches;