The static tfile is used only in one single function so move it into that

function.

usr.bin/make/job.c

@@ -330,12 +330,6 @@ static int	numCommands;
 #define	JOB_FINISHED	2	/* The job is already finished */
 #define	JOB_STOPPED	3	/* The job is stopped */
 
-/*
- * tfile is used to build temp file names to store shell commands to
- * execute.
- */
-static char	tfile[sizeof(TMPPAT)];
-
 /*
  * Descriptions for various shells.
  */
@@ -1482,6 +1476,7 @@ JobStart(GNode *gn, int flags, Job *previous)
 	Boolean	noExec;		/* Set true if we decide not to run the job */
 	int	tfd;		/* File descriptor for temp file */
 	LstNode	*ln;
+	char	tfile[sizeof(TMPPAT)];
 
 	if (interrupted) {
 		JobPassSig(interrupted);