Update to Minecraft 1.12-pre2

By: md_5 <git@md-5.net>

paper-server/nms-patches/MethodProfiler.patch

@@ -21,7 +21,7 @@
      public void a(String s) {
 +        if (!ENABLED) return;  // CraftBukkit
          if (this.a) {
-             if (this.e.length() > 0) {
+             if (!this.e.isEmpty()) {
                  this.e = this.e + ".";
 @@ -40,6 +43,7 @@
      }
@@ -51,7 +51,7 @@
  
      public String c() {
 +        if (!ENABLED) return "[DISABLED]";  // CraftBukkit
-         return this.c.size() == 0 ? "[UNKNOWN]" : (String) this.c.get(this.c.size() - 1);
+         return this.c.isEmpty() ? "[UNKNOWN]" : (String) this.c.get(this.c.size() - 1);
      }
  
 @@ -152,7 +158,7 @@