glib/valgrind.h: Disable inline ASM on MSVC x64 builds
glib/valgrind.h: Disable inline ASM on MSVC x64 builds

Visual Studio x64 builds do not allow inline assembly code, so we need
to re-add the code that disables inline assembly when we build with
Visual Studio for x64 builds, as we did before.  This is necessary when
we update the included valgrind.h.

endlessm/glib,endlessm/glib,endlessm/glib,endlessm/glib,endlessm/glib