sh: Initial gitignore list

Ignore build-time generated files.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/include/asm-sh/.gitignore b/include/asm-sh/.gitignore
new file mode 100644
index 0000000..9218ef8
--- /dev/null
+++ b/include/asm-sh/.gitignore
@@ -0,0 +1,3 @@
+cpu
+mach
+machtypes.h