usbip: remove upstreamed musl compatibility patch (#5983)

Remove musl compatibility patch that is now included
in the upstream Linux kernel and backported to stable kernels.

Commit in 4.4:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/tools/usb/usbip?h=linux-4.4.y&id=6638091f1b1623db8b2338ef5a5f26d9ec870444

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>

net/usbip/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 include $(INCLUDE_DIR)/kernel.mk
 
 PKG_NAME:=usbip
-PKG_RELEASE:=5
+PKG_RELEASE:=6
 PKG_LICENSE:=GPL-2.0
 
 # Since kernel 2.6.39.1 userspace tools are inside the kernel tree

net/usbip/patches-2.0/100-musl-compat.patch

@@ -1,11 +0,0 @@
---- a/src/usbipd.c
-+++ b/src/usbipd.c
-@@ -453,7 +453,7 @@ static void set_signal(void)
- 	sigaction(SIGTERM, &act, NULL);
- 	sigaction(SIGINT, &act, NULL);
- 	act.sa_handler = SIG_IGN;
--	sigaction(SIGCLD, &act, NULL);
-+	sigaction(SIGCHLD, &act, NULL);
- }
- 
- static const char *pid_file;