package/strace: fix build for no-MMU targets

Add patch to disable fork() calling code on !HAVE_FORK.

Fixes:
    http://autobuild.buildroot.net/results/3d506e2f6337327c0783cf3cc12a8b5fb78521e4/

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/strace/0001-disable_ptrace_get_syscall_info-disable_ptrace_getre.patch

@@ -0,0 +1,33 @@
+From 84536a993417f3bfff4a54830fa34a3f91f5716e Mon Sep 17 00:00:00 2001
+From: Baruch Siach <baruch@tkos.co.il>
+Date: Thu, 11 Mar 2021 06:43:26 +0200
+Subject: [PATCH] disable_ptrace_get_syscall_info, disable_ptrace_getregset:
+ require fork()
+
+These helper programs require fork(), so they are incompatible with
+no-MMU systems. Make the code depend on HAVE_FORK.
+
+Signed-off-by: Baruch Siach <baruch@tkos.co.il>
+---
+Upstream status: https://lists.strace.io/pipermail/strace-devel/2021-March/010421.html
+
+ src/disable_ptrace_request.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/src/disable_ptrace_request.c b/src/disable_ptrace_request.c
+index 57163e77f0f4..715006941572 100644
+--- a/src/disable_ptrace_request.c
++++ b/src/disable_ptrace_request.c
+@@ -41,7 +41,8 @@ init(int argc, char **argv)
+  && defined PR_SET_NO_NEW_PRIVS \
+  && defined PR_SET_SECCOMP \
+  && defined BPF_JUMP \
+- && defined BPF_STMT
++ && defined BPF_STMT \
++ && defined HAVE_FORK
+ 
+ static unsigned int
+ get_arch(void)
+-- 
+2.30.1
+