mamake: bind: also bind to local .a files (re: a9a8586, 8c3ab86)

The first referenced commit exposed a mamake bug introduced in the
second: when executing 'bind', a dependency was only declared on a
file that has an absolute path -- effectively, one that is already
preinstalled. But *.a files that exist in the current working
directory also need to count; when we link a binary against a
library we just built, such as linking ksh against libshell, that's
what ${mam_libshell} contains.

To fix it, instead of only declaring dependencies on /* paths,
declare dependencies on everything except strings that start with
'-l' (which are compiler flags, not real files).

src/cmd/INIT/mamake.c

@@ -27,7 +27,7 @@
  * coded for portability
  */
 
-#define RELEASE_DATE "2024-02-17"
+#define RELEASE_DATE "2024-02-27"
 static char id[] = "\n@(#)$Id: mamake (ksh 93u+m) " RELEASE_DATE " $\0\n";
 
 #if _PACKAGE_ast
@@ -1905,7 +1905,7 @@ make(Rule_t *r, int inloop, unsigned long modtime, Buf_t **parentcmd)
 					else
 						s = 0;
 					/* only bother if t is a path to a *.a we built (i.e. not -l...) */
-					if (*t == '/')
+					if (t[0] != '-' || t[1] != 'l')
 					{
 						q = rule(expand(buf, t));
 						attributes(q, v);