CMake: prevent mismatched package name warnings

Use all caps for the packages.

Closes https://github.com/wxWidgets/wxWidgets/pull/1886

build/cmake/modules/FindWEBKIT.cmake

@@ -0,0 +1,40 @@
+# - Find Webkit
+# Find the Webkit includes and library
+#
+#  WEBKIT_INCLUDE_DIR - Where to find webkit include sub-directory.
+#  WEBKIT_LIBRARIES   - List of libraries when using Webkit.
+#  WEBKIT_FOUND       - True if Webkit found.
+
+SET(WEBKIT_VERSION 1.0)
+if(DEFINED WEBKIT_FIND_VERSION)
+    SET(WEBKIT_VERSION ${WEBKIT_FIND_VERSION})
+endif()
+
+SET(WEBKIT_INCLUDE_DIR WEBKIT_INCLUDE_DIR-NOTFOUND)
+SET(WEBKIT_LIBRARY WEBKIT_LIBRARY-NOTFOUND)
+SET(WEBKIT_LIBRARIES WEBKIT_LIBRARIES-NOTFOUND)
+
+FIND_PATH(WEBKIT_INCLUDE_DIR webkit/webkit.h
+    PATH_SUFFIXES "webkitgtk-${WEBKIT_VERSION}"
+)
+
+SET(WEBKIT_NAMES "webkitgtk-${WEBKIT_VERSION}")
+FIND_LIBRARY(WEBKIT_LIBRARY
+    NAMES ${WEBKIT_NAMES}
+)
+
+# Handle the QUIETLY and REQUIRED arguments and set WEBKIT_FOUND to
+# TRUE if all listed variables are TRUE.
+INCLUDE(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(
+    WEBKIT DEFAULT_MSG
+    WEBKIT_LIBRARY WEBKIT_INCLUDE_DIR
+)
+
+IF(WEBKIT_FOUND)
+    SET( WEBKIT_LIBRARIES ${WEBKIT_LIBRARY} )
+ELSE(WEBKIT_FOUND)
+    SET( WEBKIT_LIBRARIES )
+ENDIF(WEBKIT_FOUND)
+
+MARK_AS_ADVANCED(WEBKIT_LIBRARY WEBKIT_LIBRARIES WEBKIT_INCLUDE_DIR)