build: move PEGTL to a Git submodule

.gitmodules

@@ -11,3 +11,6 @@
 	path = src/3rdparty/lua
 	url = ../../lolengine/lua.git
 	branch = lol
+[submodule "src/3rdparty/pegtl"]
+	path = src/3rdparty/pegtl
+	url = ../../lolengine/pegtl.git

build/autotools/m4/lol-conf.m4

@@ -80,7 +80,7 @@ fi
 
 dnl  Use pegtl? Yes, always
 if true; then
-  LOL_CFLAGS="$LOL_CFLAGS -I\$(lol_srcdir)/external/pegtl-1.3.1-e7752e81/include"
+  LOL_CFLAGS="$LOL_CFLAGS -I\$(lol_srcdir)/src/3rdparty/pegtl"
 fi
 
 

build/msbuild/lol.vars.props

@@ -5,8 +5,8 @@
     <ExternalDir>$(LolDir)\external</ExternalDir>
 
     <!-- PEGTL -->
-    <PegtlDir>$(ExternalDir)\pegtl-1.3.1-e7752e81</PegtlDir>
-    <PegtlIncludes>$(PegtlDir)\include</PegtlIncludes>
+    <PegtlDir>$(LolDir)\src/3rdparty\pegtl</PegtlDir>
+    <PegtlIncludes>$(PegtlDir)</PegtlIncludes>
 
     <!-- imgui -->
     <ImguiDir>$(LolDir)\src\3rdparty\imgui</ImguiDir>

src/3rdparty/pegtl

@@ -0,0 +1 @@
+Subproject commit e189c11133634e0d5e01a0c32ba1aa8174927eed