Add shell script and cross-compilation file to compile Harfbuzz with meson

meson-mingw-cross.txt

@@ -0,0 +1,17 @@
+[binaries]
+c = '@host@-gcc'
+cpp = '@host@-g++'
+ar = '@host@-ar'
+ranlib = '@host@-ranlib'
+strip = '@host@-strip'
+windres = '@host@-windres'
+pkgconfig = 'pkg-config'
+
+[host_machine]
+system = 'windows'
+cpu_family = '@cpu@'
+cpu = '@cpu@'
+endian = 'little'
+
+[properties]
+cpp_args = ['-D_WIN32_WINNT=0x0601', '-O2', '-pipe', '-march=@arch@']

mingw-meson.sh

@@ -0,0 +1,33 @@
+#!/bin/sh
+
+# Usage: ./mingw-meson.sh prefix host
+# host being i686 or x86_64
+
+case $2 in
+	i686 | x86_64) ;;
+	*) echo "Usage: $0 prefix i686|x86_64" >&2; exit 1 ;;
+esac
+
+cpu=$2
+host=$2-w64-mingw32
+if test "x$2"  = "xx86_64" ; then
+    arch=x86-64
+else
+    arch=i686
+fi
+
+rm -rf builddir && mkdir builddir && cd builddir && cp ../meson-mingw-cross.txt .
+
+sed -i -e "s/@cpu_family@/$cpu/g;s/@cpu@/$cpu/g;s/@host@/$host/g;s/@arch@/$arch/g" meson-mingw-cross.txt
+
+meson .. \
+      --prefix=$1 \
+      --libdir=lib \
+      --buildtype=release \
+      --strip \
+      --cross-file meson-mingw-cross.txt \
+      --default-library shared \
+      -Dgraphite=enabled
+
+ninja
+ninja install