yasm: Add Windows bld.bat

It does nothing but defer to build.sh

yasm/bld.bat

@@ -0,0 +1,17 @@
+:: Delegate to the Unixy script. We need to translate the key path variables
+:: to be Unix-y rather than Windows-y, though.
+set "saved_recipe_dir=%RECIPE_DIR%"
+FOR /F "delims=" %%i IN ('cygpath.exe -u -p "%PATH%"') DO set "PATH_OVERRIDE=%%i"
+FOR /F "delims=" %%i IN ('cygpath.exe -u "%LIBRARY_PREFIX%"') DO set "LIBRARY_PREFIX=%%i"
+FOR /F "delims=" %%i IN ('cygpath.exe -u "%PREFIX%"') DO set "PREFIX=%%i"
+FOR /F "delims=" %%i IN ('cygpath.exe -u "%PYTHON%"') DO set "PYTHON=%%i"
+FOR /F "delims=" %%i IN ('cygpath.exe -u "%RECIPE_DIR%"') DO set "RECIPE_DIR=%%i"
+FOR /F "delims=" %%i IN ('cygpath.exe -u "%SP_DIR%"') DO set "SP_DIR=%%i"
+FOR /F "delims=" %%i IN ('cygpath.exe -u "%SRC_DIR%"') DO set "SRC_DIR=%%i"
+FOR /F "delims=" %%i IN ('cygpath.exe -u "%STDLIB_DIR%"') DO set "STDLIB_DIR=%%i"
+set MSYSTEM=MINGW%ARCH%
+set MSYS2_PATH_TYPE=inherit
+set CHERE_INVOKING=1
+bash -lc "%RECIPE_DIR%"/build.sh
+if errorlevel 1 exit 1
+