Refactor sanitized library on-disk layout - Soong.

This CL moves the location of ASAN-ified libraries on disk in the
following manner:
/data/lib* --> /data/asan/system/lib*
/data/vendor/* --> /data/asan/vendor/*

There are a couple of advantages to this, including better isolation
from other components, and more transparent linker renaming and
SELinux policies.

Bug: 36574794
Bug: 36674745
Test: m -j40 && SANITIZE_TARGET="address" m -j40 and the device
boots. All sanitized libraries are correctly located in /data/asan/*.

Change-Id: I06bf459260ec451d4495a02562f640ad622f34c2
diff --git a/cc/cc.go b/cc/cc.go
index b107d01..6f5539f 100644
--- a/cc/cc.go
+++ b/cc/cc.go
@@ -212,6 +212,7 @@
 	installerProps() []interface{}
 	install(ctx ModuleContext, path android.Path)
 	inData() bool
+	inSanitizerDir() bool
 	hostToolPath() android.OptionalPath
 }
 
@@ -993,10 +994,17 @@
 	if c.installer == nil {
 		return false
 	}
-	if c.sanitize != nil && c.sanitize.inData() {
+	return c.installer.inData()
+}
+
+func (c *Module) InstallInSanitizerDir() bool {
+	if c.installer == nil {
+		return false
+	}
+	if c.sanitize != nil && c.sanitize.inSanitizerDir() {
 		return true
 	}
-	return c.installer.inData()
+	return c.installer.inSanitizerDir()
 }
 
 func (c *Module) HostToolPath() android.OptionalPath {