Make the cflags property configurable

So that you can use select statements on it. The current modivation
is to convert a module from make to bp with minimal soong config
variable boilerplate.

Bug: 342006386
Bug: 346922064
Test: m nothing --no-skip-soong-tests
Change-Id: I48d5a11ad3aa65c24cc199458634a5fdbeab2f64
diff --git a/cc/cmake_module_cc.txt b/cc/cmake_module_cc.txt
index 693406d..0dc45ae 100644
--- a/cc/cmake_module_cc.txt
+++ b/cc/cmake_module_cc.txt
@@ -1,6 +1,6 @@
 <<$srcs := getSources .M>>
 <<$includeDirs := getIncludeDirs .Ctx .M>>
-<<$cflags := (getCompilerProperties .M).Cflags>>
+<<$cflags := getCflagsProperty .Ctx .M>>
 <<$deps := mapLibraries .Ctx .M (concat5
 (getLinkerProperties .M).Whole_static_libs
 (getLinkerProperties .M).Static_libs