omni: add mkshrc with some aliases

this will simple overrule the one from external/mkshrc
not the nicest solution but this should not be rocket science

Change-Id: I449e313d55aefda8b23cfb87ccff580e00eeaa19
diff --git a/config/common.mk b/config/common.mk
index 9cf6a6f..462d3bb 100644
--- a/config/common.mk
+++ b/config/common.mk
@@ -64,6 +64,10 @@
     vendor/omni/prebuilt/sounds/omni_lock_phone.ogg:system/media/audio/ui/omni_lock_phone.ogg \
     vendor/omni/prebuilt/sounds/omni_unlock_phone.ogg:system/media/audio/ui/omni_unlock_phone.ogg
 
+# mkshrc
+PRODUCT_COPY_FILES += \
+    vendor/omni/prebuilt/etc/mkshrc:system/etc/mkshrc
+
 # Additional packages
 -include vendor/omni/config/packages.mk