chroot-bash: fix building vendored termcap library

srcpkgs/chroot-bash/patches/gcc14-termcap.patch

@@ -0,0 +1,20 @@
+Fix compiling with fallback termcap library
+https://lists.nongnu.org/archive/html/bug-bash/2024-12/msg00029.html
+Taken from: https://cgit.git.savannah.gnu.org/cgit/bash.git/commit/?h=bash-5.3-testing&id=f223b24c4b299f00b64e68ca7f066e5bb4f717a0
+
+diff --git a/lib/termcap/tparam.c b/lib/termcap/tparam.c
+index c4bff088e..cd500efd8 100644
+--- a/lib/termcap/tparam.c
++++ b/lib/termcap/tparam.c
+@@ -30,6 +30,10 @@ extern char *malloc ();
+ extern char *realloc ();
+ #endif
+ 
++#ifdef HAVE_UNISTD_H
++#include <unistd.h>
++#endif
++
+ #if defined (HAVE_STRING_H)
+ #include <string.h>
+ #endif
+