Make the ArgArray_Init() function visible to the rest of make.

It will soon be needed for the .SHELL parsing code.

usr.bin/make/str.c

@@ -57,7 +57,7 @@ __FBSDID("$FreeBSD$");
  * (size + 1) since we need space for the terminating NULL.  The
  * buffer is set to NULL, since no common buffer is alloated yet.
  */
-static void
+void
 ArgArray_Init(ArgArray *aa)
 {
 

usr.bin/make/str.h

@@ -67,6 +67,7 @@ typedef struct ArgArray {
 #define	STR_ADDSPACE	0x01	/* add a space when Str_Concat'ing */
 #define	STR_ADDSLASH	0x04	/* add a slash when Str_Concat'ing */
 
+void ArgArray_Init(ArgArray *);
 void ArgArray_Done(ArgArray *);
 
 char *str_concat(const char *, const char *, int);