Specify -mcpu=krait for clang.

Change-Id: I64682cddf57246341c1727ca16c56f7ce0c6fd0a
diff --git a/core/clang/arm.mk b/core/clang/arm.mk
index ca66986..ceb4a5a 100644
--- a/core/clang/arm.mk
+++ b/core/clang/arm.mk
@@ -4,6 +4,12 @@
 
 CLANG_CONFIG_arm_EXTRA_CFLAGS :=
 
+ifneq (,$(filter krait,$(TARGET_$(combo_2nd_arch_prefix)CPU_VARIANT)))
+  # Android's clang support's krait as a CPU whereas GCC doesn't. Specify
+  # -mcpu here rather than the more normal core/combo/arch/arm/armv7-a-neon.mk.
+  CLANG_CONFIG_arm_EXTRA_CFLAGS += -mcpu=krait
+endif
+
 CLANG_CONFIG_arm_EXTRA_CPPFLAGS :=
 
 CLANG_CONFIG_arm_EXTRA_LDFLAGS :=
diff --git a/core/combo/arch/arm/armv7-a-neon.mk b/core/combo/arch/arm/armv7-a-neon.mk
index 3f4c391..d535afc 100644
--- a/core/combo/arch/arm/armv7-a-neon.mk
+++ b/core/combo/arch/arm/armv7-a-neon.mk
@@ -9,7 +9,8 @@
 ifneq (,$(filter cortex-a15 krait denver,$(TARGET_$(combo_2nd_arch_prefix)CPU_VARIANT)))
 	# TODO: krait is not a cortex-a15, we set the variant to cortex-a15 so that
 	#       hardware divide operations are generated. This should be removed and a
-	#       krait CPU variant added to GCC/clang.
+	#       krait CPU variant added to GCC. For clang we specify -mcpu for krait in
+	#       core/clang/arm.mk.
 	arch_variant_cflags := -mcpu=cortex-a15
 
 	# Fake an ARM compiler flag as these processors support LPAE which GCC/clang