Add various packages and patches for build system improvements

- Introduced valgrind with a patch to respect flags and updated its configuration.
- Added Vulkan ICD loader with CMake build configuration.
- Implemented Waf build system with a custom build script and configuration.
- Included Wayland protocols with Meson build system.
- Added xcb-util-keysyms with autotools configuration.
- Introduced Yasm with multiple patches for compatibility and improvements.
- Added Yelp tools and XSL with Meson build configurations and necessary patches for POSIX compliance.

extra/valgrind/valgrind-3.7.0-respect-flags.patch

@@ -0,0 +1,13 @@
+diff -Naur valgrind-3.7.0.orig//mpi/Makefile.am valgrind-3.7.0/mpi/Makefile.am
+--- valgrind-3.7.0.orig/mpi/Makefile.am	2011-10-26 17:24:23.000000000 -0400
++++ valgrind-3.7.0/mpi/Makefile.am	2011-11-10 16:03:14.000000000 -0500
+@@ -7,9 +7,6 @@
+ CC = $(MPI_CC)
+ DEFS =
+ DEFAULT_INCLUDES =
+-CPPFLAGS =
+-CFLAGS =
+-LDFLAGS =
+ 
+ EXTRA_DIST = \
+ 	mpiwrap_type_test.c