ghcjs: init at 8.10.7

The src points to the obsidiansystems repo as it has the ghcjs ported from
8.10.5 to 8.10.7, and a bunch of other fixes (#812, #811, #809)

(cherry picked from commit ba25b274f4bb0240a8ffa71e41b55712930af3d8)
Modified the stm_2_5_0_1 -> stm_2_5_0_0

pkgs/development/compilers/ghcjs/patches/vector-ghcjs-storable-set.patch

@@ -0,0 +1,14 @@
+diff --git a/Data/Vector/Storable/Mutable.hs b/Data/Vector/Storable/Mutable.hs
+index 8b538bc..2b74fce 100644
+--- a/Data/Vector/Storable/Mutable.hs
++++ b/Data/Vector/Storable/Mutable.hs
+@@ -197,7 +197,9 @@ storableSet (MVector n fp) x
+                   1 -> storableSetAsPrim n fp x (undefined :: Word8)
+                   2 -> storableSetAsPrim n fp x (undefined :: Word16)
+                   4 -> storableSetAsPrim n fp x (undefined :: Word32)
++#if !defined(ghcjs_HOST_OS)
+                   8 -> storableSetAsPrim n fp x (undefined :: Word64)
++#endif
+                   _ -> unsafeWithForeignPtr fp $ \p -> do
+                        poke p x
+