Add Haiku OS support to build system

scripts/automator/build/clang-haiku_x86_64

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+ld="ld"

scripts/automator/build/gcc-haiku_x86_64

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+# Tool additions
+ldflags+=(-Wl,--as-needed)
+
+# Enable math vectorizions using instructions avaiable in circa-2008+ CPUs
+x86_math=(-mfpmath=sse -msse4.2)
+cflags_release+=("${x86_math[@]}")
+cflags_optinfo+=("${x86_math[@]}")

scripts/automator/build/os-haiku

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+cflags+=(-fPIC)
+
+function make_binary() {
+	make \
+		--jobs="$(nproc)" \
+		--output-sync=line \
+		|& tee build.log
+}
+
+dependencies=(objdump -afp "${executable}")

scripts/automator/packages/clang-haikuports

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+compiler=(llvm${postfix}_clang)

scripts/automator/packages/manager-haikuports

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+# Package repo: https://depot.haiku-os.org
+delim=""
+packages+=(ccache coreutils autoconf automake autoconf_archive
+           pkgconfig libpng ncurses6_devel libsdl2_devel
+           sdl2_net_devel libogg_devel opus_devel opusfile_devel
+           gcc_syslibs_devel opus_tools)