[CMake] Remove glib-related Find modules and write single new one instead.

[CMake] Remove glib-related Find modules and write single new one instead.
https://bugs.webkit.org/show_bug.cgi?id=93786

Reviewed by Rob Buis.

.:

As part of the ongoing effort to write proper Find modules that use
absolute include and library paths instead of the short ones from
pkg-config, replace Find{GIO,Glib,Gthread}.cmake with a single
FindGLIB.cmake that optionally detects components such as GIO and
GObject.

Library paths are now defined as "/full/path/to/libfoo.so" instead of
simply "foo", so that the linker receives a full path and we can then
avoid accidentally picking up a libfoo.so installed into /usr/lib
instead of a local one built with jhbuild.

* Source/cmake/FindGIO.cmake: Removed.
* Source/cmake/FindGLIB.cmake: Added.
* Source/cmake/FindGlib.cmake: Removed.
* Source/cmake/FindGthread.cmake: Removed.
* Source/cmake/OptionsEfl.cmake: Look for GLIB with the GIO component.

Source/JavaScriptCore:

* shell/PlatformEfl.cmake: Use GLIB_* instead of Glib_*.

Source/WebCore:

No new tests, build system plumbing.

* PlatformEfl.cmake: Use GLIB_* instead of Glib_*, and link
directly against GIO, as code in the soup network backend uses
that.

Source/WebKit:

* PlatformEfl.cmake: Use GLIB_* instead of Glib_*.

Source/WebKit2:

* PlatformEfl.cmake: Use GLIB_* instead of Glib_*.

Source/WTF:

* wtf/PlatformEfl.cmake: Use GLIB_* instead of Glib_*, and link directly to GIO, as wtf/gobject uses functions from it.

Tools:

* DumpRenderTree/efl/CMakeLists.txt: Use GLIB_* instead of Glib_*.
* EWebLauncher/CMakeLists.txt: Ditto.
* MiniBrowser/efl/CMakeLists.txt: Ditto.
* WebKitTestRunner/PlatformEfl.cmake: Ditto.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@125443 268f45cc-cd09-0410-ab3c-d52691b4dbfc