Support .asm being compiled by yasm targeted for x86.

Change-Id: Icd6626a082facf920b0e49e2fbe8861e94400552
diff --git a/core/config.mk b/core/config.mk
index 7150380..47d01ea 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -367,6 +367,8 @@
 BISON := prebuilts/misc/$(BUILD_OS)-$(HOST_PREBUILT_ARCH)/bison/bison
 YACC := $(BISON) -d
 
+YASM := prebuilts/misc/$(BUILD_OS)-$(HOST_PREBUILT_ARCH)/yasm/yasm
+
 DOXYGEN:= doxygen
 AAPT := $(HOST_OUT_EXECUTABLES)/aapt$(HOST_EXECUTABLE_SUFFIX)
 AIDL := $(HOST_OUT_EXECUTABLES)/aidl$(HOST_EXECUTABLE_SUFFIX)