Set sh4 cpu

.github/workflows/build.yml

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 77d3842..ec19fe0 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -35,6 +35,7 @@
          - HOST: "sh4-linux-gnu"
            CONFIGURE_OPTIONS: "--disable-shared"
            QEMU_LD_PREFIX: "/usr/sh4-linux-gnu"
+           QEMU_CPU: 'sh7785'
          - HOST: "alpha-linux-gnu"
            CONFIGURE_OPTIONS: "--disable-shared"
            QEMU_LD_PREFIX: "/usr/alpha-linux-gnu"