meta-phosphor: gpio-monitor: Add symlink as git

Add a symbolic link to phosphor-gpio-monitor.bb named _git.bb and sets
the preferred version for the recipe.

Change-Id: Ie3141693b811e2f0bd5aa182b4f26faeee2c933a
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/conf/distro/include/phosphor-defaults.inc b/conf/distro/include/phosphor-defaults.inc
index ed2cd74..526108e 100644
--- a/conf/distro/include/phosphor-defaults.inc
+++ b/conf/distro/include/phosphor-defaults.inc
@@ -244,3 +244,5 @@
 # Will add a build dependency to host-ipmid on the
 # phosphor-ipmi-fru-whitelist-native recipe.
 VIRTUAL-RUNTIME_phosphor-ipmi-providers ?= "phosphor-ipmi-fru"
+
+PREFERRED_VERSION_phosphor-gpio-monitor = "1.0"
diff --git a/recipes-phosphor/gpio/phosphor-gpio-monitor_git.bb b/recipes-phosphor/gpio/phosphor-gpio-monitor_git.bb
new file mode 120000
index 0000000..711c057
--- /dev/null
+++ b/recipes-phosphor/gpio/phosphor-gpio-monitor_git.bb
@@ -0,0 +1 @@
+phosphor-gpio-monitor.bb
\ No newline at end of file