ledflasher: Disable RTTI

There is no longer a reliance on RTTI in libbrillo, so disable RTTI
in the rest of Brillo codebase.

With RTTI disabled, we rely on __PRETTY_FUNCTION__ macro to infer some
type names. Unfortunately CLANG and GCC use different decorations for
template types with default parameters (such as std::vector and std::map)
which causes problems.

Since most of Brillo code is compiled with clang, use that for code
that relies on brillo::Any.

BUG: 26292405
Change-Id: I922649add010fd68dab90146894494864f44c02e
diff --git a/src/ledflasher/Android.mk b/src/ledflasher/Android.mk
index 12d9cac..eea3ac9 100644
--- a/src/ledflasher/Android.mk
+++ b/src/ledflasher/Android.mk
@@ -37,7 +37,7 @@
 
 LOCAL_C_INCLUDES := external/gtest/include
 LOCAL_CFLAGS := -Wall -Werror -Wno-sign-promo -Wno-error=unused-parameter
-LOCAL_RTTI_FLAG := -frtti
+LOCAL_CLANG := true
 
 include $(BUILD_EXECUTABLE)
 
diff --git a/src/ledservice/Android.mk b/src/ledservice/Android.mk
index 12054ce..e263399 100644
--- a/src/ledservice/Android.mk
+++ b/src/ledservice/Android.mk
@@ -35,6 +35,7 @@
 	libhardware \
 	libutils \
 
+LOCAL_CLANG := true
 LOCAL_C_INCLUDES := external/gtest/include
 LOCAL_CFLAGS := \
         -Wall \
@@ -42,7 +43,6 @@
         -Wno-sign-promo \
         -Wno-missing-field-initializers \
         -Wno-error=unused-parameter
-LOCAL_RTTI_FLAG := -frtti
 
 include $(BUILD_EXECUTABLE)