vendor: update buildkit to 2f99651

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

vendor/github.com/moby/sys/signal/signal_windows.go

@@ -0,0 +1,34 @@
+package signal
+
+import (
+	"syscall"
+
+	"golang.org/x/sys/windows"
+)
+
+// Signals used in cli/command (no windows equivalent, use
+// invalid signals so they don't get handled)
+const (
+	SIGCHLD  = syscall.Signal(0xff)
+	SIGWINCH = syscall.Signal(0xff)
+	SIGPIPE  = syscall.Signal(0xff)
+)
+
+// SignalMap is a map of "supported" signals. As per the comment in GOLang's
+// ztypes_windows.go: "More invented values for signals". Windows doesn't
+// really support signals in any way, shape or form that Unix does.
+var SignalMap = map[string]syscall.Signal{
+	"ABRT": syscall.Signal(windows.SIGABRT),
+	"ALRM": syscall.Signal(windows.SIGALRM),
+	"BUS":  syscall.Signal(windows.SIGBUS),
+	"FPE":  syscall.Signal(windows.SIGFPE),
+	"HUP":  syscall.Signal(windows.SIGHUP),
+	"ILL":  syscall.Signal(windows.SIGILL),
+	"INT":  syscall.Signal(windows.SIGINT),
+	"KILL": syscall.Signal(windows.SIGKILL),
+	"PIPE": syscall.Signal(windows.SIGPIPE),
+	"QUIT": syscall.Signal(windows.SIGQUIT),
+	"SEGV": syscall.Signal(windows.SIGSEGV),
+	"TERM": syscall.Signal(windows.SIGTERM),
+	"TRAP": syscall.Signal(windows.SIGTRAP),
+}