games-emulation/shadPS4: fix build error

Closes: https://bugs.gentoo.org/976333
Signed-off-by: Ceres <ceres@ceressees.dev>

games-emulation/shadPS4/files/shadPS4-0.15.0-syscall.patch

@@ -0,0 +1,15 @@
+Add includes for syscall
+Closes: https://bugs.gentoo.org/976333
+From: https://github.com/shadps4-emu/shadPS4/commit/c68a8baa947fabfd74efaca1ba027ca15abf73db
+
+--- a/src/core/tls.cpp
++++ b/src/core/tls.cpp
+@@ -21,6 +21,8 @@
+ #if defined(__linux__) && defined(ARCH_X86_64)
+ #include <asm/prctl.h>
+ #include <sys/prctl.h>
++#include <sys/syscall.h>
++#include <unistd.h>
+ #endif
+ 
+ namespace Core {

games-emulation/shadPS4/shadPS4-0.15.0.ebuild

@@ -50,6 +50,7 @@ src_prepare() {
 	eapply "${FILESDIR}/${P}-cmake-4.patch"
 	eapply "${FILESDIR}/${P}-executable-stack.patch"
 	eapply "${FILESDIR}/${P}-sstream.patch"
+	eapply "${FILESDIR}/${P}-syscall.patch"
 	mv src/core/libraries/fiber/fiber_context.s src/core/libraries/fiber/fiber_context.S || die
 	cmake_src_prepare
 }