CMake files: Add license boilerplate

Signed-off-by: Timothy Gu <timothygu99@gmail.com>

src/cmake/FindFreetype.cmake

@@ -1,3 +1,6 @@
+# This file is part of MXE.
+# See index.html for further information.
+
 if(NOT PKG_CONFIG_FOUND)
   find_package(PkgConfig REQUIRED)
 endif()

src/cmake/FindSDL.cmake

@@ -1,3 +1,6 @@
+# This file is part of MXE.
+# See index.html for further information.
+
 if(NOT PKG_CONFIG_FOUND)
   find_package(PkgConfig REQUIRED)
 endif()

src/cmake/FindSDL_image.cmake

@@ -1,3 +1,6 @@
+# This file is part of MXE.
+# See index.html for further information.
+
 if(NOT PKG_CONFIG_FOUND)
   find_package(PkgConfig REQUIRED)
 endif()

src/cmake/FindSDL_mixer.cmake

@@ -1,3 +1,6 @@
+# This file is part of MXE.
+# See index.html for further information.
+
 if(NOT PKG_CONFIG_FOUND)
   find_package(PkgConfig REQUIRED)
 endif()

src/cmake/FindSDL_net.cmake

@@ -1,3 +1,6 @@
+# This file is part of MXE.
+# See index.html for further information.
+
 if(NOT PKG_CONFIG_FOUND)
   find_package(PkgConfig REQUIRED)
 endif()

src/cmake/FindSDL_sound.cmake

@@ -1,3 +1,6 @@
+# This file is part of MXE.
+# See index.html for further information.
+
 if(NOT PKG_CONFIG_FOUND)
   find_package(PkgConfig REQUIRED)
 endif()

src/cmake/FindSDL_ttf.cmake

@@ -1,3 +1,6 @@
+# This file is part of MXE.
+# See index.html for further information.
+
 if(NOT PKG_CONFIG_FOUND)
   find_package(PkgConfig REQUIRED)
 endif()

src/sdl_image-test-CMakeLists.txt

@@ -1,3 +1,6 @@
+# This file is part of MXE.
+# See index.html for further information.
+
 project(18)
 cmake_minimum_required(VERSION 2.8)
 

src/sdl_sound-test-CMakeLists.txt

@@ -1,3 +1,6 @@
+# This file is part of MXE.
+# See index.html for further information.
+
 project(18)
 cmake_minimum_required(VERSION 2.8)