Bump process submodule to v1.6.25.0

(cherry picked from commit 18f532f3)

process @ 9c3bfc21

-Subproject commit 8364eaa2c83f7918be41cf3bd520e4ede1b07c35
+Subproject commit 9c3bfc214c72bbd0c8a30a1c41465deed0feaf47

testsuite/tests/process/process004.hs

@@ -4,8 +4,13 @@ import System.IO.Error
 import System.Process
 
 main :: IO ()
-main = do test1 `catchIOError` \e -> putStrLn ("Exc: " ++ show e)
-          test2 `catchIOError` \e -> putStrLn ("Exc: " ++ show e)
+main = do
+  -- N.B. Only show the error type since the exact error text
+  -- may depend upon precise system call which @process@ decided
+  -- to use.
+  let printError e = putStrLn ("Exc: " ++ show (ioeGetErrorType e))
+  test1 `catchIOError` printError
+  test2 `catchIOError` printError
 
 test1 :: IO ()
 test1 = do

testsuite/tests/process/process004.stdout

-Exc: true: runInteractiveProcess: chdir: invalid argument (Bad file descriptor)
-Exc: true: runProcess: chdir: does not exist (No such file or directory)
+Exc: does not exist
+Exc: does not exist

testsuite/tests/process/process004.stdout-javascript-unknown-ghcjs

-Exc: true: runInteractiveProcess: does not exist (No such file or directory)
-Exc: true: runProcess: does not exist (No such file or directory)
+Exc: does not exist
+Exc: does not exist

testsuite/tests/process/process004.stdout-mingw32

-Exc: true: runInteractiveProcess: invalid argument (Invalid argument)
-Exc: true: runProcess: invalid argument (Invalid argument)
+Exc: invalid argument
+Exc: invalid argument