[fluidsynth] Initial port (#3016)

* [portaudio] Added ASIO support to build

* Update libpng to 1.6.34

* [liblo] Initial port

* Revert "Update libpng to 1.6.34"

This reverts commit ede0bb9.

* Revert "[liblo] Initial port"

This reverts commit bb819eb.

* [fluidsynth] Initial port

* Fixed version numbers

ports/fluidsynth/CONTROL

@@ -0,0 +1,4 @@
+Source: fluidsynth
+Version: 1.1.10
+Description: FluidSynth reads and handles MIDI events from the MIDI input device. It is the software analogue of a MIDI synthesizer. FluidSynth can also play midifiles using a Soundfont.
+Build-Depends: glib

ports/fluidsynth/portfile.cmake

@@ -0,0 +1,34 @@
+include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/fluidsynth-1.1.10)
+
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO FluidSynth/fluidsynth
+    REF v1.1.10
+    SHA512 7ff7757baf6dee37f65a4fd214ffab1aa1434cfd1545deb4108fe2e9b0ed19d616880b2740a693b51ade0a4be998a671910b43cae26eb67fb97b16a513752cbc
+    HEAD_REF master
+)
+
+vcpkg_configure_cmake(
+    SOURCE_PATH ${SOURCE_PATH}
+    PREFER_NINJA # Disable this option if project cannot be built with Ninja
+    OPTIONS -Denable-pkgconfig=0
+)
+
+vcpkg_install_cmake()
+
+# Copy fluidsynth.exe to tools dir
+file(COPY ${CURRENT_PACKAGES_DIR}/bin/fluidsynth.exe DESTINATION ${CURRENT_PACKAGES_DIR}/tools/fluidsynth)
+vcpkg_copy_tool_dependencies(${CURRENT_PACKAGES_DIR}/tools/fluidsynth)
+
+# Remove unnecessary files
+file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
+file(REMOVE ${CURRENT_PACKAGES_DIR}/bin/fluidsynth.exe)
+file(REMOVE ${CURRENT_PACKAGES_DIR}/debug/bin/fluidsynth.exe)
+
+if(VCPKG_LIBRARY_LINKAGE STREQUAL static)
+    file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/bin ${CURRENT_PACKAGES_DIR}/debug/bin)
+endif()
+
+# Handle copyright
+file(INSTALL ${SOURCE_PATH}/LICENSE DESTINATION ${CURRENT_PACKAGES_DIR}/share/fluidsynth RENAME copyright)