Fix iq2000 libgloss for c99/gcc-14

[Jeff Law]

Similar to the others in this space.  Make implicit ints explicit ints. 
Add prototype for _write in sbrk.c.

OK for the trunk?

jeff
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diff --git a/libgloss/iq2000/getpid.c b/libgloss/iq2000/getpid.c
index 20ab1866e..fea57daff 100644
--- a/libgloss/iq2000/getpid.c
+++ b/libgloss/iq2000/getpid.c
@@ -4,7 +4,8 @@
 #include "trap.h"
 
 
-_getpid (n)
+int
+_getpid (int n)
 {
   return 1;
 }
diff --git a/libgloss/iq2000/isatty.c b/libgloss/iq2000/isatty.c
index 7e63a8c7c..3d8eb1910 100644
--- a/libgloss/iq2000/isatty.c
+++ b/libgloss/iq2000/isatty.c
@@ -4,8 +4,8 @@
 #include "trap.h"
 
 
-_isatty (fd)
-     int fd;
+int
+_isatty (int fd)
 {
   return 1;
 }
diff --git a/libgloss/iq2000/kill.c b/libgloss/iq2000/kill.c
index 40afa6a2c..d63a2f82c 100644
--- a/libgloss/iq2000/kill.c
+++ b/libgloss/iq2000/kill.c
@@ -4,7 +4,8 @@
 #include "trap.h"
 
 
-_kill (n, m)
+int
+_kill (int n, int m)
 {
   return TRAP0 (SYS_exit, 0xdead, 0, 0);
 }
diff --git a/libgloss/iq2000/read.c b/libgloss/iq2000/read.c
index 31d24cce9..2f1878c06 100644
--- a/libgloss/iq2000/read.c
+++ b/libgloss/iq2000/read.c
@@ -4,6 +4,7 @@
 #include "trap.h"
 
 
+int
 _read (int file,
        char *ptr,
        size_t len)
diff --git a/libgloss/iq2000/sbrk.c b/libgloss/iq2000/sbrk.c
index 6dfd93b02..15bd8c8b9 100644
--- a/libgloss/iq2000/sbrk.c
+++ b/libgloss/iq2000/sbrk.c
@@ -4,6 +4,7 @@
 #include <sys/stat.h>
 #include "trap.h"
 
+int _write (int, char *, size_t);
 
 caddr_t
 _sbrk (size_t incr)