Replace AConfig() with Config()

AConfig() is deprecated and equivalent to Config()

Test: m nothing --no-skip-soong-tests
Change-Id: I08db0e10a45a54ea15f589c0843f0b6ca1855092

diff --git a/soong/clang.go b/soong/clang.go
index cd2838b..82e0dec 100644
--- a/soong/clang.go
+++ b/soong/clang.go

@@ -43,7 +43,7 @@
 	}
 	p := &props{}
 
-	if ctx.AConfig().IsEnvTrue("FORCE_BUILD_LLVM_COMPONENTS") {
+	if ctx.Config().IsEnvTrue("FORCE_BUILD_LLVM_COMPONENTS") {
 		p.Target.Host.Compile_multilib = proptools.StringPtr("both")
 		p.Multilib.Lib32.Suffix = proptools.StringPtr("_32")
 	}