Move third party code to code/thirdparty

Makefile

@@ -278,14 +278,14 @@ BLIBDIR=$(MOUNT_DIR)/botlib
 NDIR=$(MOUNT_DIR)/null
 UIDIR=$(MOUNT_DIR)/ui
 Q3UIDIR=$(MOUNT_DIR)/q3_ui
-JPDIR=$(MOUNT_DIR)/jpeg-9f
-CURLDIR=$(MOUNT_DIR)/curl-8.15.0
-OGGDIR=$(MOUNT_DIR)/libogg-1.3.6
-VORBISDIR=$(MOUNT_DIR)/libvorbis-1.3.7
-OPUSDIR=$(MOUNT_DIR)/opus-1.5.2
-OPUSFILEDIR=$(MOUNT_DIR)/opusfile-0.12
-OPENALDIR=${MOUNT_DIR}/openal-soft-1.24.3
-ZDIR=$(MOUNT_DIR)/zlib-1.3.1
+JPDIR=$(MOUNT_DIR)/thirdparty/jpeg-9f
+CURLDIR=$(MOUNT_DIR)/thirdparty/curl-8.15.0
+OGGDIR=$(MOUNT_DIR)/thirdparty/libogg-1.3.6
+VORBISDIR=$(MOUNT_DIR)/thirdparty/libvorbis-1.3.7
+OPUSDIR=$(MOUNT_DIR)/thirdparty/opus-1.5.2
+OPUSFILEDIR=$(MOUNT_DIR)/thirdparty/opusfile-0.12
+OPENALDIR=${MOUNT_DIR}/thirdparty/openal-soft-1.24.3
+ZDIR=$(MOUNT_DIR)/thirdparty/zlib-1.3.1
 TOOLSDIR=$(MOUNT_DIR)/tools
 Q3ASMDIR=$(MOUNT_DIR)/tools/asm
 LBURGDIR=$(MOUNT_DIR)/tools/lcc/lburg
@@ -298,8 +298,8 @@ TOMSFASTMATHSRCDIR=$(AUTOUPDATERSRCDIR)/rsa_tools/tomsfastmath-0.13.1
 LOKISETUPDIR=misc/setup
 NSISDIR=misc/nsis
 WEBDIR=$(MOUNT_DIR)/web
-SDLHDIR=$(MOUNT_DIR)/SDL2-2.32.8
-LIBSDIR=$(MOUNT_DIR)/libs
+SDLHDIR=$(MOUNT_DIR)/thirdparty/SDL2-2.32.8
+LIBSDIR=$(MOUNT_DIR)/thirdparty/libs
 
 bin_path=$(shell which $(1) 2> /dev/null)