[lldb][lldb-dap] Fix runInTerminal test program on Windows

Author: DavidSpickett

lldb/test/API/tools/lldb-dap/runInTerminal/main.c

@@ -1,6 +1,10 @@
 #include <stdio.h>
 #include <stdlib.h>
+#ifdef _WIN32
+#include <stdlib.h>
+#else
 #include <unistd.h>
+#endif
 
 int main(int argc, char *argv[]) {
   const char *foo = getenv("FOO");