[libilbc] New port

libilbc is an Internet Low Bit Rate Codec (iLBC) / RFC 3951 codec.
Closes #14836.

ports/libilbc/CONTROL

@@ -0,0 +1,4 @@
+Source: libilbc
+Version: 3.0.3
+Description: Open source implementation of the Internet Low Bit Rate Codec (iLBC) / RFC 3951 codec from the WebRTC project.
+Homepage: https://github.com/TimothyGu/libilbc

ports/libilbc/portfile.cmake

@@ -0,0 +1,39 @@
+set(ILBC_VERSION 3.0.3)
+vcpkg_download_distfile(ARCHIVE
+    URLS "https://github.com/TimothyGu/libilbc/releases/download/v${ILBC_VERSION}/libilbc-${ILBC_VERSION}.zip"
+    FILENAME "libilbc-${ILBC_VERSION}.zip"
+    SHA512 a5755db093529f6a3fd8fd47da63b57cffff1d3babef443d92f7c5a250ce8d1585adfba525c4037b142d9f00f1675a5054c172bf936be280dfcc22ed553c94c6
+)
+
+vcpkg_extract_source_archive_ex(
+    OUT_SOURCE_PATH SOURCE_PATH
+    ARCHIVE ${ARCHIVE}
+    REF ${ILBC_VERSION}
+)
+
+string(COMPARE EQUAL "${VCPKG_LIBRARY_LINKAGE}" "dynamic" BUILD_SHARED_LIBS)
+
+vcpkg_configure_cmake(
+    SOURCE_PATH ${SOURCE_PATH}
+    PREFER_NINJA
+    OPTIONS
+        -DBUILD_SHARED_LIBS=${BUILD_SHARED_LIBS}
+)
+vcpkg_install_cmake()
+file(INSTALL ${SOURCE_PATH}/COPYING DESTINATION ${CURRENT_PACKAGES_DIR}/share/${PORT} RENAME copyright)
+
+file(GLOB EXES "${CURRENT_PACKAGES_DIR}/bin/*.exe")
+if(EXES)
+    file(REMOVE ${EXES})
+endif()
+
+file(GLOB DEBUG_EXES "${CURRENT_PACKAGES_DIR}/debug/bin/*.exe")
+if(DEBUG_EXES)
+    file(REMOVE ${DEBUG_EXES})
+endif()
+
+file(REMOVE_RECURSE "${CURRENT_PACKAGES_DIR}/debug/include")
+file(REMOVE_RECURSE "${CURRENT_PACKAGES_DIR}/debug/share")
+if(VCPKG_LIBRARY_LINKAGE STREQUAL "static")
+    file(REMOVE_RECURSE "${CURRENT_PACKAGES_DIR}/bin" "${CURRENT_PACKAGES_DIR}/debug/bin")
+endif()

scripts/ci.baseline.txt

@@ -598,6 +598,7 @@ libics:x64-uwp=fail
 libigl:arm64-windows=fail
 libigl:arm-uwp=fail
 libigl:x64-uwp=fail
+libilbc:arm-uwp=fail
 liblemon:arm-uwp=fail
 liblemon:x64-uwp=fail
 liblo:arm-uwp=fail