[libmodplug] Fix WASM build by pinning C++ standard to 11 (#37090)

Fixes #37089 

The port uses the register storage class specifier which was removed in
C++17, pinning the standard to C++11 solves this.

- [x] Changes comply with the [maintainer
guide](https://github.com/microsoft/vcpkg-docs/blob/main/vcpkg/contributing/maintainer-guide.md).
- [x] SHA512s are updated for each updated download.
- [x] The "supports" clause reflects platforms that may be fixed by this
new version.
- [x] Any fixed [CI
baseline](https://github.com/microsoft/vcpkg/blob/master/scripts/ci.baseline.txt)
entries are removed from that file.
- [x] Any patches that are no longer applied are deleted from the port's
directory.
- [x] The version database is fixed by rerunning `./vcpkg x-add-version
--all` and committing the result.
- [x] Only one version is added to each modified port's versions file.

ports/libmodplug/portfile.cmake

@@ -17,7 +17,16 @@ vcpkg_from_github(
         005-fix-install-paths.patch # https://github.com/Konstanty/libmodplug/pull/61
 )
 
-vcpkg_cmake_configure(SOURCE_PATH "${SOURCE_PATH}")
+set(EXTRA_OPTIONS)
+
+if(VCPKG_TARGET_IS_EMSCRIPTEN)
+    list(APPEND EXTRA_OPTIONS "-DCMAKE_CXX_STANDARD=11")
+endif()
+
+vcpkg_cmake_configure(
+    SOURCE_PATH "${SOURCE_PATH}"
+    OPTIONS ${EXTRA_OPTIONS}
+)
 
 vcpkg_cmake_install()
 

ports/libmodplug/vcpkg.json

@@ -1,7 +1,7 @@
 {
   "name": "libmodplug",
   "version": "0.8.9.0",
-  "port-version": 10,
+  "port-version": 11,
   "description": "The ModPlug mod file playing library.",
   "homepage": "https://github.com/Konstanty/libmodplug",
   "license": null,

versions/baseline.json

@@ -4610,7 +4610,7 @@
     },
     "libmodplug": {
       "baseline": "0.8.9.0",
-      "port-version": 10
+      "port-version": 11
     },
     "libmorton": {
       "baseline": "0.2.12",

versions/l-/libmodplug.json

@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "d9af89d39aa5f14bf7314ebc51bc74df26ff2a3b",
+      "version": "0.8.9.0",
+      "port-version": 11
+    },
     {
       "git-tree": "605d260810f9d1a489af7fb484d509581b39763d",
       "version": "0.8.9.0",