Rename compiler, linker and installer methods to be unique

compiler, linker, and installer interfaces may be implemented by a
single decorator object, rename their methods to be unique to avoid the
same method being called multiple times.

Test: out/soong/build.ninja unchanged
Change-Id: I1608c41cd68f614ba99c11bb9fcc7936f618d9aa
diff --git a/cc/installer.go b/cc/installer.go
index 7dc2b78..9a1e1fa 100644
--- a/cc/installer.go
+++ b/cc/installer.go
@@ -42,7 +42,7 @@
 
 var _ installer = (*baseInstaller)(nil)
 
-func (installer *baseInstaller) props() []interface{} {
+func (installer *baseInstaller) installerProps() []interface{} {
 	return []interface{}{&installer.Properties}
 }