[GTK] Clean up compiler optimizations flags for libWTF, libJSC
https://bugs.webkit.org/show_bug.cgi?id=126157

Reviewed by Gustavo Noronha Silva.

Source/JavaScriptCore: 

* GNUmakefile.am: Remove the -fstrict-aliasing and -O3 compiler flags for libWTF.la. -O3 gets
overridden by -O2 that's listed in CXXFLAGS (or -O0 in case of debug builds) and -fstrict-aliasing
is enabled when -O2 is used (and shouldn't be enabled in debug builds anyway).

Source/WTF: 

* GNUmakefile.am: Remove the -fstrict-aliasing and -O3 compiler flags for libWTF.la. -O3 gets
overridden by -O2 that's listed in CXXFLAGS (or -O0 in case of debug builds) and -fstrict-aliasing
is enabled when -O2 is used (and shouldn't be enabled in debug builds anyway).


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@160996 268f45cc-cd09-0410-ab3c-d52691b4dbfc
webkit gtk 2.2.3 stable tarball compilation error
https://bugs.webkit.org/show_bug.cgi?id=125987

Reviewed by Gustavo Noronha Silva.

Only try including <gdk/gdkwayland.h> and using GDK_IS_WAYLAND_DISPLAY if the Wayland support has been
enabled and when not compiling with GTK+ 2 (which occurs when building for libPlatformGtk2).

* platform/graphics/GLContext.cpp:
(WebCore::GLContext::createContextForWindow):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@160997 268f45cc-cd09-0410-ab3c-d52691b4dbfc