arch/tile/Makefile: use KCFLAGS when figuring out the libgcc path.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
diff --git a/arch/tile/Makefile b/arch/tile/Makefile
index 17acce7..5e4d3b9 100644
--- a/arch/tile/Makefile
+++ b/arch/tile/Makefile
@@ -30,7 +30,8 @@
 KBUILD_CFLAGS   += $(CONFIG_DEBUG_EXTRA_FLAGS)
 endif
 
-LIBGCC_PATH     := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
+LIBGCC_PATH     := \
+  $(shell $(CC) $(KBUILD_CFLAGS) $(KCFLAGS) -print-libgcc-file-name)
 
 # Provide the path to use for "make defconfig".
 KBUILD_DEFCONFIG := $(ARCH)_defconfig