Define odm_available property to install a vendor variant to odm

'vendor_available: true' creates a vendor variant from a system
module. The vendor variant of the module is installed to /vendor.
However, we may want to install the vendor variant to /odm, instead.

'device_specific: true' does not work for this purpose because
'vendor_available: true' is allowed only for the system or product
modules to create a vendor variant. But 'device_specific: true'
itself creates a vendor variant that may not work with
'vendor_available: true'.

To install the vendor variant to /odm, we define a new property
'odm_available'. 'odm_available' is exactly the same as the
'vendor_available' except the install path of the vendor variant.
By defining 'odm_available: true', the vendor variant of the module
will be installed to /odm or /vendor/odm instead of /vendor.

Bug: 176147321
Bug: 176079978
Test: check if a module with 'odm_available: true' is installed to
      /vendor/odm
Change-Id: I2d16bd2c515796597b2fbd1eb66f7c2736434697
diff --git a/cc/cc.go b/cc/cc.go
index 8755efe..afa6bf9 100644
--- a/cc/cc.go
+++ b/cc/cc.go
@@ -390,6 +390,17 @@
 	// Nothing happens if BOARD_VNDK_VERSION isn't set in the BoardConfig.mk
 	Vendor_available *bool
 
+	// This is the same as the "vendor_available" except that the install path
+	// of the vendor variant is /odm or /vendor/odm.
+	// By replacing "vendor_available: true" with "odm_available: true", the
+	// module will install its vendor variant to the /odm partition or /vendor/odm.
+	// As the modules with "odm_available: true" still create the vendor variants,
+	// they can link to the other vendor modules as the vendor_available modules do.
+	// Also, the vendor modules can link to odm_available modules.
+	//
+	// It may not be used for VNDK modules.
+	Odm_available *bool
+
 	// whether this module should be allowed to be directly depended by other
 	// modules with `product_specific: true` or `product_available: true`.
 	// If set to true, an additional product variant will be built separately